F-Roads in Iceland: What You Need to Know
Iceland's highland roads are only accessible with 4x4 vehicles. Rules, season, and safety tips for F-roads.
What Are F-Roads?
F-roads (from Icelandic "fjall" = mountain) are Iceland's highland tracks that cross the uninhabited interior. They are marked with an "F" before the road number (e.g., F26, F35, F208) and place special demands on both vehicle and driver.
Basic rule: F-roads may only be driven with 4-wheel drive (4×4) vehicles. Regular cars are prohibited and violations are punished with heavy fines (from 50,000 ISK). In case of an accident on an F-road without a 4×4, all insurance coverage is void.
Season and Opening Times
Most F-roads are only open from late June to early September. The exact timing depends on snowmelt and varies from year to year. Check current road conditions at road.is and safetravel.is. Driving on a closed F-road is illegal and can be expensive.
River Crossings
Many F-roads include unbridged river crossings. This is the greatest danger in the highlands. Water levels and currents change with time of day (highest in the afternoon due to glacial melt), weather, and season.
Important rules for river crossings:
Always check depth on foot first (trekking poles help). Cross rivers in the morning when water levels are lowest. When in doubt, wait or turn back – no photo is worth the risk. Drive at an angle against the current, low RPM, high gear.
Popular F-Roads
F35 (Kjölur): The "easiest" highland route, connecting South and North Iceland. No major river crossings. Landmannalaugar → Hveravellir → Blönduós.
F26 (Sprengisandur): The longest highland route through the barren stone desert in the center. Multiple river crossings, for experienced drivers only.
F208 (to Landmannalaugar): Short but notorious for the river crossing at the end. There is an alternative approach via F225 without a river crossing.