F333 Haukadalsvegur: The Interior Spur

The F333 Haukadalsvegur represents one of Iceland's most accessible entries into the highland interior, yet remains refreshingly overlooked by the masses who flock to the Landmannalaugar and Kjölur routes. This 47-kilometre mountain road branches northeast from the Ring Road near Geysir, threading through the Haukadalur valley before ascending into genuine highland terrain that offers a taste of Iceland's vast uninhabited centre.

Unlike the more famous F-roads that require serious commitment and preparation, the F333 serves as an excellent introduction to highland driving whilst delivering spectacular volcanic landscapes, geothermal areas, and that profound sense of isolation that defines Iceland's interior. The route terminates at Kerlingarfjöll, one of Iceland's most underrated mountain ranges, making it a worthy destination for those seeking alpine hiking and dramatic rhyolite formations without the crowds of more famous highland destinations.

Route Overview and Access

The F333 begins its journey 6 kilometres east of Geysir, branching north from the Ring Road (Route 35) at a well-marked junction. The initial 15 kilometres follow good gravel surfaces suitable for robust 2WD vehicles in dry conditions, though the route's official F-road designation reflects the reality that weather can deteriorate rapidly, making 4WD essential for safe passage.

The road gains approximately 800 metres in elevation over its length, climbing from the Haukadalur valley floor at roughly 100 metres above sea level to over 900 metres at Kerlingarfjöll. This ascent reveals Iceland's geological layers dramatically, transitioning from the relatively green lowland valleys through increasingly barren volcanic terrain to the stark beauty of the highland plateau.

The Lower Route: Haukadalur to Hveravellir Junction

The F333's first section follows the Hvítá river valley, passing several abandoned farms that speak to the historical challenges of highland agriculture. The landscape here retains some vegetation, with hardy grasses and Arctic willows clinging to the volcanic soil, but the transition towards true highland terrain becomes apparent within the first 10 kilometres.

At kilometre 18, the road passes the junction with F347, which leads west towards Hveravellir. This intersection marks a significant psychological boundary—beyond this point, you're committed to genuine highland travel with all the responsibilities that entails. Mobile phone coverage disappears entirely, and the nearest assistance lies hours away even in good conditions.

The geological interest intensifies beyond the junction, with clear evidence of the volcanic processes that continue to shape this region. Fresh lava flows, some dating to historical eruptions, cross the road at several points, whilst obsidian deposits glitter darkly in roadside cuts. The Hvítá river, still visible to the east, has carved dramatic gorges through these volcanic deposits, creating a landscape that feels simultaneously ancient and newly formed.

The Highland Section: Approaching Kerlingarfjöll

The final 20 kilometres of the F333 reveal why this route deserves recognition among serious highland travellers. The road climbs steadily through increasingly dramatic terrain, with the Kerlingarfjöll range dominating the northern horizon. These mountains, composed primarily of rhyolite formed during subglacial eruptions, display an extraordinary palette of colours—reds, yellows, and oranges that intensify under certain light conditions.

River crossings become more frequent and challenging in this section. The Hvítá's tributaries, fed by glacial melt and highland precipitation, can rise dramatically during storms or warm weather. Two particular crossings at kilometres 31 and 38 require careful assessment, especially during spring melt or after heavy rain. The water temperature rarely exceeds 2-3°C, making any mishap potentially serious.

The road surface deteriorates noticeably in this highland section, with loose volcanic gravel, embedded rocks, and washouts from seasonal flooding. Average speeds rarely exceed 20-25 kilometres per hour, making the final approach to Kerlingarfjöll a test of both vehicle capability and driver patience.

Kerlingarfjöll: Highland Destination

The F333 terminates at Kerlingarfjöll, altitude 950 metres, where a small hut and camping area provide the only accommodation for many kilometres in any direction. The Kerlingarfjöll mountain range rises directly from this base, offering some of Iceland's finest highland hiking opportunities within a relatively compact area.

The mountains themselves represent a geothermal wonderland, with active hot springs, fumaroles, and areas of ground so hot that snow rarely accumulates despite the elevation. The contrast between steaming ground and surrounding glacial terrain creates an otherworldly atmosphere that exemplifies Iceland's unique geological character.

Practical Considerations

**Vehicle Requirements**: Despite optimistic online reports, treating the F333 as a 4WD-only route prevents disappointment and potential danger. Ground clearance becomes crucial in the upper sections, where embedded rocks and washouts can trap lower vehicles.

**Timing**: The road typically opens in late June, though conditions vary dramatically with seasonal weather patterns. September often provides the most stable conditions, with lower river levels and settled weather, though temperatures drop significantly. The route usually becomes impassable by mid-October.

**Fuel and Supplies**: No services exist along the entire route. Ensure adequate fuel for the return journey plus significant reserves—the nearest petrol station lies 47 kilometres away at Geysir, with no guarantee of roadside assistance if problems develop.

**Weather Monitoring**: Highland weather changes rapidly and dramatically. Check conditions at Kerlingarfjöll specifically, as weather at Geysir provides little indication of highland conditions. Temperature differences of 15-20°C between the start and end points are common.

The F333 Haukadalsvegur offers genuine highland adventure within reach of Iceland's Golden Circle, making it an excellent introduction to F-road travel whilst delivering landscapes and experiences that rival any of Iceland's more famous interior routes. For those prepared for its challenges, it provides access to some of the country's most spectacular and least crowded volcanic terrain.

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