The Roads That Open for Six Weeks: F-Roads and the Highlands

Vegagerðin publishes the exact day each mountain road opened for the last five years. It is a plain table, and it dismantles most of what is written about the Icelandic Highlands. The road to Landmannalaugar opened on 23 May in 2025 and on 23 June in 2022 — a month apart, same road. The road across Austurleið has never once opened in June except in 2023. And Kjölur, the route everybody calls F35, is not an F-road at all.

This is desk research. Nobody from this publication has driven an F-road, and nothing below should be read as a judgement about whether any particular route or river is passable on any particular day. It is built from Vegagerðin, the Icelandic Road and Coastal Administration; from the Nature Conservation Act and the Road Act as published by Alþingi; from Umhverfisstofnun, the Environment Agency; and from the published terms of licensed Icelandic rental operators. Where those sources disagree, both are named. It is the practical companion to our Landmannalaugar dossier (D-011).

What an F-road is, and what it is not

Start with the disappointing part. There is no article of Icelandic law that says F-roads may only be driven by four-wheel-drive vehicles. We looked.

The Road Act, vegalög No. 80/2007, sorts the national network into categories — stofnvegir, tengivegir, héraðsvegir and, at the bottom of the hierarchy, landsvegir: roads over mountains and moorland that belong to none of the other classes, carry seasonal traffic and receive minimal service. Every F-road is a landsvegur. But the statute never uses the letter F, and it does not restrict landsvegir to any class of vehicle.

What Vegagerðin does publish is a construction and access standard. Its road classification runs A to F, where F is the lowest class and means, in the agency's own word, trails. That class is then split three ways. F1 is passable in summer by general traffic and is nothing more than a track. F2 is for four-wheel-drive vehicles, powerful passenger cars and jeeps, with rivers and lakes unbridged. F3 requires large, well-equipped four-wheel-drive vehicles or modified super-jeeps over uneven, rocky ground.

This raises a question almost nobody asks. Every guide states confidently that the F in F208 stands for fjall, mountain. It may well. But Vegagerðin's own published classification already uses F for its lowest road standard, and we could not find an official statement of the prefix's etymology anywhere on the agency's site. We report the popular claim as popular, not as sourced.

So what actually stops a two-wheel-drive car on an F-road? Three things, none of them the one usually cited. The sign at the entrance to the route, which is enforceable because ignoring a traffic sign is an offence. The rental contract, which is where the real teeth are — Blue Car Rental states flatly that 4x4 vehicles are mandatory on all F-roads and that insurance is invalid if a small two-wheel-drive car is taken onto one. And the general prohibition on driving off roads, which is where the criminal law genuinely lives. The practical effect is exactly what the guides describe. The mechanism is not.

The table nobody quotes

Vegagerðin publishes, for every major mountain road section by section — 23 sections across 17 roads in the version we read — the date each one actually opened in every year from 2021 to 2025. Not an estimate, not a seasonal average: the day. Here is what it says, expressed as the five-year mean opening date and the full spread of the five values.

• Uxahryggjavegur 52 — mean 7 May. Earliest 2 May 2022, latest 20 May 2025.
• Kjalvegur 35, Gullfoss-Hveravellir — mean 7 June. 30 May 2025 to 14 June 2024: a 15-day spread, the tightest of any long route.
• F208 Fjallabaksleið nyrðri, Sigalda-Landmannalaugar — mean 8 June. 23 May 2025 to 23 June 2022: a 31-day spread on the busiest highland road in the country.
• Kaldadalsvegur 550 — mean 13 June.
• Hólsfjallavegur 864 — mean 14 June, and the widest swing in the table: 30 May 2023 against 2 July 2024, thirty-three days apart.
• F225 Landmannaleið, Dómadalur — mean 16 June.
• F206 Lakagígar — mean 20 June.
• F905 Arnardalsleið — mean 21 June.
• F88 Öskjuleið, both sections — mean 24 June. 14 June 2023 to 2 July 2024.
• F902 Kverkfjallaleið — mean 25 June, and the steadiest road in the country: every opening in five years fell between 20 and 30 June.
• F208, Landmannalaugar-Eldgjá — mean 25 June, a full seventeen days later than the section that reaches Landmannalaugar from the north.
• F894 Öskjuvatnsvegur — mean 30 June.
• F752 Skagafjarðarleið — mean 4 July.
• F261 Emstruleið — mean 5 July.
• F26 Sprengisandur, Hrauneyjar-Nýidalur — mean 6 July. 21 June 2023 to 13 July, which happened twice.
• F210 Fjallabaksleið syðri, Keldur-Hvanngil — mean 7 July.
• F821 Eyjafjarðarleið — mean 7 July.
• F910 Austurleið — mean 15 July. 30 June 2023 to 26 July 2022.

Three things fall out of that list immediately.

The first is that the interior does not have a season; it has a queue. Thirty-eight days separate the mean opening of Kjölur from the mean opening of Austurleið. A traveller who lands on 15 June has most of the western highlands and none of the eastern.

The second is that the years are not interchangeable. 2023 was early almost everywhere — it holds the earliest date in the five-year window for F88, F905, F210, F821, F752, F26 and Hólsfjallavegur. 2022 was late almost everywhere. Anyone building a plan from a friend's photographs is planning last year's summer.

The third is the most useful, and it is the one that survives the averaging. The highlands do not thaw as a unit. In 2025, F208 into Landmannalaugar opened on 23 May, the earliest date recorded anywhere in the table for that road. In the same summer, Fjallabaksleið syðri did not open to Hvanngil until 14 July, and Emstruleið not until the same day — both the latest dates in their own rows. Fifty-two days apart, in adjacent country, in one year.

Testing the six weeks

The title of this piece is a compression, and the data does not support it as a general statement. We are going to say so rather than quietly leave it.

Six weeks would mean the roads closing in the third week of July. They do not. The complication is that Vegagerðin publishes no closing dates at all — the table is opening-only, and we could find no official register of the day any mountain road shut in any year. The agency's guidance covers spring and early summer, and refers the reader to live status for everything else. So the honest form of the sentence is that the open window is bounded below by a published date and above by nothing published.

What can be said: the busiest route in the highlands, F208 to Landmannalaugar, has opened on or before 23 June in all five recorded years and on average on 8 June, and the interior is normally driveable until autumn snow — a window measured in months, not weeks. Six weeks is close to a fair description of one specific case: the highest and latest routes in a bad year. F910 Austurleið opened on 26 July in 2022. If that road closed in early September, six weeks is exactly what it was.

The title stays because it describes the felt shape of the thing — the interior is a door that is shut most of the year — but the number belongs to Austurleið in a poor summer, not to the network.

What popular coverage gets wrong: Kjölur is not an F-road

This is the correction worth carrying. Search for the Kjölur route and you will find it called F35 on maps, in guidebooks, in rental blogs and in the metadata of half the photographs taken along it. Vegagerðin does not call it that. In the official opening table it appears as Kjalvegur, 35 — no prefix — split into two sections, Gullfoss to Hveravellir and Hveravellir to Blönduvirkjun. Every neighbouring row in the same table carries its F: F206, F208, F210, F225, F26, F261, F752, F821, F88, F894, F902, F905, F910. Kjalvegur does not. Nor do Hólsfjallavegur 864, Kaldadalsvegur 550 or Uxahryggjavegur 52.

The reason is physical. Kjölur has no mandatory river crossing on the main route; the fords that once defined it were bridged. Take away the unbridged rivers and the F2 standard no longer describes the road.

Now the part that matters, and where most coverage goes wrong in both directions. One camp says Kjölur is an F-road and therefore a 4x4 is required by law. The other, having discovered the reclassification, concludes that a two-wheel-drive rental is therefore fine and insured. Both are wrong, and the second is expensive.

A rental insurance exclusion written against F-roads does not, on its face, reach a road numbered 35. But the operators do not rely on that clause alone. Lava Car Rental's own guidance states that two-wheel-drive cars, including all-wheel-drive vehicles, should not be taken on Kjölur, and that customers travelling Kjölur and its connecting highland roads must use a suitable 4x4 approved for the route — the restriction is written against the named road, not against the letter. The same operator notes that damage caused by prohibited driving, off-road driving or use of an unauthorised vehicle may not be covered.

So the correct question at a rental desk is never is this an F-road. It is does my contract permit this specific road number. The two questions have different answers on Kjölur, and the contract is the one that pays.

AI illustration

The rivers, and the clause everyone signs

An unbridged glacial ford is not a fixed obstacle. It is a discharge measurement that changes through the day: meltwater rises through warm afternoons and after rain, so the same crossing can be trivial at eight in the morning and impassable at four. The Icelandic Met Office runs the real-time hydrological network that measures it — and as of 13 August 2026 its public measurement map carries a notice that the service publishing hydrological data has been turned off owing to a malfunction, which is worth knowing before relying on a river gauge you found online.

The method is unglamorous and not optional. Stop before the water. Cross where the track crosses, at the wide, rippled, boring section rather than the smooth narrow one, which is smooth because it is deep. Low gear, walking pace, no stopping, angled slightly downstream. If the water would reach above the wheel hubs of your particular vehicle, or you cannot tell, you wait or you turn around.

On insurance we are going to be more careful than the previous version of this article was. It asserted that water damage is never covered, full stop. Every Icelandic rental operator whose public pages we could open describes water damage from river crossings as outside all its protection products, and Blue Car Rental states plainly that travel on F-roads is at the customer's own risk and that recovery is not always covered. We could not open the full contractual terms of any operator to quote the exclusion clause verbatim, so we present it as the operators' own summary of their contracts rather than as the contract text. Treat it as true and read your own agreement anyway: it is the only document that governs your case.

Off the track

Here the law is unambiguous, and it is the one part of highland driving where the criminal code is directly engaged. Article 31 of the Nature Conservation Act, lög um náttúruvernd No. 60/2013, opens with a single sentence: Bannað er að aka vélknúnum ökutækjum utan vega — it is prohibited to drive motor vehicles off roads. The exceptions are narrow and named: frozen ground or solid snow cover in uninhabited areas where no damage results, agricultural work, search and rescue and police and medical work, certain infrastructure work, and specific permits from the Environment Agency for filming, hut maintenance and disabled access. Article 32 provides for a register of routes on which motorised traffic is allowed. Umhverfisstofnun's own guidance for visitors is blunter: off-road driving is strictly prohibited and punishable by fines or imprisonment.

We are not going to quote a krónur figure. The penalty provision is Article 90, and the version of the act we could retrieve was truncated before it; several travel sites circulate specific fine amounts that we could not trace to any official schedule. What is verifiable is the prohibition, the enforcing agency and the existence of imprisonment as a sanction.

The rationale is not sentimental. Icelandic volcanic soil is loose, the growing season is short, and a single set of ruts becomes a water channel that accelerates erosion for decades. Which is also why the highlands close in spring for a reason most visitors never hear: not snow, but aurbleyta, the waterlogged thaw. Vegagerðin has closed most highland roads in April on those grounds alone, and the 4x4 club Ferðaklúbburinn 4x4 puts the rule to its own members in five words — do not drive on the trail, beside it.

Two roads that are not in the table

Two of the most-asked-about routes in Iceland are absent from Vegagerðin's opening record entirely. F249, the road into Þórsmörk, does not appear. Neither does F224, the short spur from F208 to the Landmannalaugar campsite — the agency's row stops at Sigalda-Landmannalaugar and does not break out the final approach. Both are real numbered routes. Neither has a published opening history, which means that for the two destinations most travellers actually want, the five-year table offers nothing, and the live map is the only instrument. That absence is not a small gap in an otherwise complete record; it is a gap exactly where the demand is.

Why the friction is the point

It would be technically straightforward to bridge the remaining rivers and grade the tracks; Kjölur is the proof, and its reward for being bridged was to lose its letter. But the network as it stands is one of Europe's most effective filters — an unintentional permit system in which the licence is competence and the fee is patience. Our Access Friction note (M-002) argues that caps, seasons and bad roads are what keep places worth reaching. The highlands are that argument drawn in gravel, and Vegagerðin's table is its ledger: thirty-eight days between the mean opening of the first major route and the last, one road that opened on 23 May and another that opened on 26 July, and no closing date published for any of them.

The Traveler's Panel · checked 13 August 2026

Changing information. Prices, permits, seasons and road access change, sometimes at short notice. Everything here is a starting point for your own confirmation — not a quote, and not a guarantee. Verify with the operator and the relevant official body before you book.

The record	Vegagerðin publishes actual opening dates for 23 road sections, 2021-2025
Earliest big route	Kjalvegur 35 — five-year mean 7 June; opened 30 May in 2025
Landmannalaugar	F208 Sigalda-Laugar — mean 8 June; 23 May 2025 to 23 June 2022
Latest big route	F910 Austurleið — mean 15 July; 26 July in 2022
Closing dates	Not published. umferdin.is live status is the only instrument
Not an F-road	Kjölur is road 35. So are Hólsfjallavegur 864, Kaldadalsvegur 550, Uxahryggjavegur 52
Vehicle	4x4 required by contract and sign on F-roads; check the road number, not the letter
Emergency	112 · register a travel plan at safetravel.is before any interior route

Getting there — Reykjavík or Selfoss for Fjallabak and Kjölur · Mývatn for Askja · Egilsstaðir for Austurleið

1. Check umferdin.is on the morning you drive, not the week before. It is Vegagerðin's live per-road status service and it replaced road.is; the traffic service line is 1777.
2. Use the five-year table to plan, not to decide. It tells you that arriving on 10 June puts Kjölur and F208 in reach and leaves Sprengisandur, Austurleið and Fjallabaksleið syðri closed in most years — a useful shape for an itinerary, and no substitute for the live map.
3. Openings are staged within a single road. F208 opens from Sigalda to Landmannalaugar first, on average 8 June, and from Landmannalaugar to Eldgjá seventeen days later. Reaching Landmannalaugar does not mean the route through to the south coast is passable.
4. Roads inside protected areas may stay shut after the snow has gone. Vegagerðin states explicitly that where a mountain road crosses a conservation area it may not open until the area itself is judged fit to receive visitors, even when the road is clear.
5. Two roads most travellers want are absent from the official record: F249 to Þórsmörk and F224 to the Landmannalaugar campsite. For those, the live map is all there is.

Indicative costs — verify before booking

The roads	No toll, no permit, no cap. The F-road network is free to enter
The vehicle	The real cost: a contract-approved 4x4, not an AWD crossover
Recovery	Not always covered by rental insurance, and there is no cheap tow in the interior
Water damage	Excluded from every operator protection product we could read
Off-road driving	Fines or imprisonment under the Nature Conservation Act, No. 60/2013

What to pack

• Fuel for the whole route and beyond it. There is no station between the edge of the Ring Road and the far side of the interior on most of these roads.
• The road number of every leg you intend to drive, written down, checked against your rental contract before you leave the desk. The letter on the sign is not what the contract is written against.
• Food and water for a day longer than the plan, and warm layers: these are 500-900 m routes in a sub-Arctic interior, in a season that starts in late May.
• A downloaded map. Mobile coverage fails for long stretches, and the live road map is useless without signal.
• Nothing that encourages leaving the track — no drone-launch ambitions off the verge, no shortcut instinct around a puddle. Detouring around an obstacle is the single most common way a legal journey becomes an illegal one.

Where to stay

The highland huts are the accommodation: Ferðafélag Íslands runs 40 of them around the country, and the classic interior ones — Landmannalaugar, Nýidalur, Hvítárnes, the Laugavegur chain — are bookable ahead and fill early in season. Herðubreiðarlindir and Drekagil serve the Askja approach, where Vatnajökulsþjóðgarður stations rangers through the summer only. Outside those, the practical bases are on the edges: Hveravellir on Kjölur, Hrauneyjar at the mouth of Sprengisandur, Mývatn and Reykjahlíð for F88 and the eastern interior, Hella and Hvolsvöllur for the Fjallabak roads. Nothing in the interior is open in winter, and Landmannalaugar cannot be reached in a standard rental car once the season closes — the alternatives then are skis, a snowmobile or a modified super-jeep.

Safety & responsible travel

• Stay on the marked track without exception. Article 31 of the Nature Conservation Act prohibits driving motor vehicles off roads, and Umhverfisstofnun states that it is punishable by fines or imprisonment.
• Do not drive beside the track to avoid a rut or a wet patch. That is the specific behaviour Ferðaklúbburinn 4x4 and the Road Administration both name as the cause of permanent damage during the spring thaw.
• Respect spring closures. Highland roads are shut in April and May for aurbleyta — waterlogged, thawing ground — as much as for snow, and a road that looks clear may still be closed for that reason.
• Cross rivers where the track crosses them, never where the line looks smoother, and turn around rather than guess. Water damage is the one loss no rental insurance we could read will absorb.
• Camp at designated sites only, and carry out everything. The interior has no services to absorb waste and no winter maintenance to erase what is left behind.

Nearby, and quieter

The interior is not a single destination but a sequence of them, opening in order. In the west, Kjölur reaches Hveravellir and the Kerlingarfjöll geothermal ground on a road with no mandatory ford. Fjallabak holds Landmannalaugar, Eldgjá and the Laugavegur trailheads, served by F208, F225, F210 and F261. Sprengisandur crosses the centre between the two icecaps on F26, with Nýidalur at its midpoint. In the north-east, F88 and F894 reach Herðubreiðarlindir, Drekagil and Askja inside Vatnajökull National Park, with F902 continuing to Kverkfjöll and F905 and F910 running the Arnardalur and Austurleið lines toward the Kárahnjúkar country. Þórsmörk, reached by F249, sits outside the official opening record altogether.

Getting there, in order

• 1Reykjavík or Selfoss for Fjallabak and Kjölur
• ↓
• 2Mývatn for Askja
• ↓
• 3Egilsstaðir for Austurleið

Each leg is a separate booking and a separate chance to be weathered out. Build spare days into the chain, not onto the end of it.

Sources & further reading — checked 13 August 2026

1. Vegagerðin — Opening of mountain roads (official, English). The core dataset: actual opening dates for 23 mountain-road sections in each of 2021, 2022, 2023, 2024 and 2025, including F208 in three sections, F26 and F210 in two each, and Kjalvegur printed as road 35 without an F prefix
2. Vegagerðin — Opnun fjallvega (official, Icelandic). The same table in Icelandic, used to verify every date quoted here a second time; also the statement that snow cover decides opening, that wet roads delay it, and that roads through protected areas may stay shut after they are clear of snow until the area itself can take visitors
3. Vegagerðin — Fjallvegir, travel information (official). That the agency's published guidance covers spring and early-summer opening only, with the highland map updated as conditions change — and that no closing dates are published
4. Vegagerðin — Mountain roads (official, English). That opening depends on spring and early-summer weather, with snowpack the dominant factor and wet roads a secondary cause of late opening
5. Vegagerðin — Roads and road classification (official, English). The A-to-F road standard in which F is the lowest class and denotes trails, and the F1/F2/F3 subdivision: F1 general summer traffic, F2 four-wheel drive with unbridged rivers, F3 large well-equipped 4x4 or super-jeep only
6. Vegagerðin — Fjallvegir, road system (official). F-class trails as landsvegir with seasonal summer access and reduced or absent winter service
7. Vegagerðin — Vegaskrá, the national road register (official). That road classification and numbering is Vegagerðin's own register rather than a statutory list, with the categories stofnvegir, tengivegir, héraðsvegir and landsvegir, and the downloadable vegaskrá for 2025
8. Vegagerðin — Opnun fjallvega, five-year table (official PDF, 2023 edition). That the agency has published this five-year format for years, with columns for earliest, latest and mean opening across the preceding five seasons, and that Kjalvegur appears there too as 35 without an F — cited for structure only, because the figures could not be extracted reliably
9. Alþingi — Lög um náttúruvernd nr. 60/2013 (Nature Conservation Act). Article 31's opening sentence prohibiting driving motor vehicles off roads; the named exceptions for frozen or solidly snow-covered ground, agriculture, emergency services, infrastructure work and permitted activities; Article 32's register of routes open to motor traffic; and the reference of breaches to the penalty provision at Article 90
10. Alþingi — Vegalög nr. 80/2007 (Road Act). The definition of landsvegir as roads over mountains and moorland outside the other categories, with seasonal traffic and minimal service — and the absence of any statutory mention of F-roads or of a four-wheel-drive requirement
11. Umhverfisstofnun — Driving in uninhabited areas (official, English). That off-road driving is strictly prohibited and punishable by fines or imprisonment; the instruction to drive only on roads and marked trails; and the reasoning from loose volcanic soil, a short Arctic growing season and ruts becoming water channels
12. Umhverfisstofnun — Lokun hálendisvega (news, April 2019). That Vegagerðin closed most highland roads in April on account of aurbleyta, the waterlogged spring thaw, rather than snow
13. Ísland.is — Off-road driving permit (official government portal). That all off-road driving is prohibited under the Nature Conservation Act, that the Nature Conservation Agency decides permit applications, and the 15-working-day processing standard (30 days in the Mývatn and Laxá conservation area)
14. Ferðaklúbburinn 4x4 — Lokanir hálendisvega. The 4x4 club's own account of spring closures: Vegagerðin closes highland roads while snow melts and frost leaves the ground, because untimely traffic and detours around obstacles cut deep ruts and cause potentially permanent damage — and the instruction not to drive beside the trail
15. Umferðin.is — live road notifications (Vegagerðin's traffic portal). The live per-road status service that replaces road.is, and the 1777 traffic service line — the only official instrument for closures, since none are published in advance
16. Veðurstofa Íslands — Icelandic Met Office (official). The national hydrological monitoring network reporting average river flow and temperature over the last 24 hours, and the notice, current on 13 August 2026, that the service publishing hydrological data on the measurement map has been turned off owing to a malfunction
17. SafeTravel — ICE-SAR travel safety service (official). The travel-plan practice of leaving a comprehensive plan with someone able to act on it, the SafeTravel app for current conditions, and the warning that Icelandic weather and road conditions change fast
18. Vatnajökulsþjóðgarður — Askja (national park, official). That rangers are stationed at Drekagil and Herðubreiðarlindir in summer only, with a ranger on site daily at Askja in high season — the practical limit of the F88 and F894 season
19. Blue Car Rental — F-roads (licensed operator). The operator's own wording that 4x4 vehicles are mandatory on all F-roads, that insurance is invalid if a two-wheel-drive car is used on one, that recovery is not always covered, and that F-road travel is at the customer's own risk
20. Lava Car Rental — Kjölur, Route 35 (licensed operator). That the route is officially Road 35 or Kjalvegur while travellers, maps and guides still call it F35; that there are no mandatory river crossings on the main Kjölur route; that two-wheel-drive and all-wheel-drive cars should not be taken on it and a suitable approved 4x4 is required; and that damage from prohibited driving or an unauthorised vehicle may not be covered
21. Ferðafélag Íslands — mountain huts (Iceland Touring Association). That the association runs 40 mountain huts across the country, the accommodation backbone of the highland season
22. Ferðafélag Íslands — Landmannalaugar hut. That the hut is reached by 4x4 and that it is not possible to drive to Landmannalaugar in winter in a standard rental car — access then requires hiking, skiing, a snowmobile or a modified super-jeep
23. Drive.is — Icelandic driving safety guidance. General Icelandic driving hazards relevant to highland approaches: gravel roads and passing on them, blind hills and curves, single-lane bridges and 24-hour daylight

Official and scientific bodies are the authority for safety, regulatory and scientific claims. Commercial operators are used only for practical detail such as tour length, meeting points and indicative pricing — never for a safety or scientific statement.