F249 and F39: The Eastern Þórsmörk Approaches

The eastern approaches to Þórsmörk via F249 and F39 represent some of Iceland's most challenging yet rewarding highland driving experiences. These formidable F-roads carve through the desolate interior, crossing multiple glacial rivers and traversing landscapes sculpted by volcanic fury and glacial might. For those seeking an authentic highland adventure away from the more travelled western approaches, these routes offer unparalleled access to one of Iceland's most spectacular wilderness areas.

Understanding the Route Network

F249, known as Landmannaleið, stretches 54 kilometres from Landmannalaugar to its junction with F208 near Eldgjá, whilst F39 branches northeast from this network, connecting the highland interior to Route 1 near Kirkjubæjarklaustur. Together, these roads form a crucial link in Iceland's highland transport system, though their remote nature and technical demands place them firmly in expert territory.

The route to Þórsmörk via this eastern approach typically involves taking F208 south from the F249/F39 junction, then connecting to F210 before accessing the valley system. This circuitous route adds significant distance compared to the direct western approaches via F249 from Háifoss, but rewards drivers with pristine highland scenery and genuine wilderness immersion.

F249: The Landmannaleið Challenge

F249 presents one of Iceland's most technically demanding highland drives. The route begins innocuously enough near Landmannalaugar, but quickly reveals its true character as it descends towards the glacial outwash plains. The road crosses no fewer than seven significant river systems, including the notoriously unpredictable Kaldaklofskvísl and Syðri-Ófæra.

River crossings here demand absolute concentration and proper technique. The Kaldaklofskvísl, fed by Mýrdalsjökull's glacial melt, can rise dramatically within hours during warm weather or volcanic activity beneath the ice cap. Water levels typically range from 30-60 centimetres during normal conditions, but can exceed one metre during peak melt periods in July and August.

The road surface alternates between loose volcanic sand, sharp lava rock, and boggy sections that can trap unwary drivers. Ground clearance of at least 35 centimetres is essential, though 40+ centimetres provides greater confidence. Tyre pressure adjustments are crucial—reducing to 1.5-1.8 bar improves traction on sand whilst preventing punctures on lava fields.

F39: The Northern Connector

F39 serves as the primary link between the highland route network and the coastal Ring Road, but this 42-kilometre stretch demands respect. The northern section crosses extensive lava fields from historical eruptions, where razor-sharp aa lava can destroy tyres in minutes if approached carelessly.

The road's middle section traverses the Eldgjá area, site of the largest volcanic eruption in recorded human history (934-940 AD). Here, the landscape bears witness to catastrophic forces—a 75-kilometre-long fissure that produced an estimated 19.6 cubic kilometres of lava. The road threads between massive lava formations and deep fissures, creating an otherworldly driving experience.

Approaching the junction with Route 1, F39 crosses several smaller streams fed by highland springs and seasonal runoff. These crossings are generally straightforward compared to F249's challenges, but remain potentially hazardous during intense rainfall or rapid snowmelt.

Seasonal Considerations and Timing

Both routes remain officially closed from October through May, though actual accessibility depends heavily on weather patterns. The Icelandic Road Administration typically opens these roads in late June or early July, following snow clearance and bridge inspections.

Peak accessibility occurs during August and early September, when river levels stabilise and weather patterns become more predictable. July presents higher river crossings due to glacial melt, whilst September brings increased rainfall that can rapidly transform stream crossings into torrential barriers.

Weather in this region changes with terrifying speed. Highland storms can reduce visibility to mere metres whilst generating fierce crosswinds capable of destabilising high-profile vehicles. The nearest weather station at Kirkjubæjarklaustur provides some guidance, but conditions 50 kilometres inland often differ dramatically.

Vehicle Requirements and Preparation

Success on these routes demands proper equipment and preparation. Vehicle requirements include:

- Minimum engine displacement of 2000cc for adequate power reserves

- Manual transmission preferred for precise control during river crossings

- Snorkel air intake systems recommended for deep water crossings

- Comprehensive recovery equipment including tow straps, shovel, and sand tracks

- GPS navigation with detailed F-road mapping

- Satellite communication device for emergency contact

Fuel consumption increases dramatically on rough highland surfaces. Budget for 15-20 litres per 100 kilometres, significantly higher than paved road consumption. The nearest fuel stops are Landmannalaugar (limited summer supply) and Kirkjubæjarklaustur, making range calculation critical.

Navigation and Safety Protocols

Mobile phone coverage disappears completely once leaving Route 1, making self-reliance paramount. GPS coordinates for key river crossings and potential camping spots should be pre-loaded, as landmarks can become obscured during poor weather.

Travel in convoy is strongly recommended—never attempt these routes solo. Crossing rivers requires specific protocols: test depth and bottom conditions on foot, select crossing points carefully, maintain steady momentum without excessive speed, and keep windows down for rapid escape if necessary.

Emergency supplies must include food for 72 hours, emergency shelter, first aid kit, and mechanical tools. The nearest rescue services operate from Reykjavík or Selfoss, with response times potentially exceeding 8-12 hours during adverse conditions.

The Þórsmörk Reward

Those who successfully navigate F249 and F39 earn access to Þórsmörk via the quieter eastern approaches, avoiding the crowds that sometimes characterise the western routes. The landscape here retains its pristine wilderness character—no facilities, no marked paths, just raw Icelandic highland terrain sculpted by ice and fire.

The eastern valley approaches offer spectacular perspectives of Eyjafjallajökull and Mýrdalsjökull that remain hidden from conventional viewpoints. Hiking opportunities abound, from short valley explorations to challenging glacier approaches requiring mountaineering experience.

Camping in this region requires complete self-sufficiency and adherence to Leave No Trace principles. The fragile highland ecosystem takes decades to recover from damage, making responsible travel practices essential for preserving this remarkable landscape for future adventurers.

These eastern approaches to Þórsmörk represent highland driving at its most authentic and challenging—a true test of skill, preparation, and respect for Iceland's unforgiving interior wilderness.

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