Devil's Loop

The Devil’s Loop is a legendary cycling challenge covering 110 km of relentless climbing through Slovenia’s most breathtaking alpine roads. This is not a ride for the faint-hearted—be well-conditioned and prepared for an all-day battle against gravity.

Starting in Bovec, the route first winds through the stunning Trenta Valley, following the Soča River before tackling the demanding ascent to Vršič Pass (1,611 m)—Slovenia’s highest road pass. With an average gradient of 7–8%, the climb becomes especially punishing in the final kilometer, where it ramps up to 12%. At the top, cyclists are often greeted by a herd of sheep, a reminder that we are merely guests in this high-mountain world.

A technical descent with cobbled switchbacks leads into Kranjska Gora, passing the scenic Lake Jasna. From here, the route follows a fast, slightly downhill cycling path toward Tarvisio, where the climbing resumes. A gradual ascent leads back into Slovenia via Predil Pass (1,156 m), where the road steepens through a series of switchbacks before reaching the base of Mangart Road—Slovenia’s highest paved climb. The 10 km ascent to Mangart Saddle (2,055 m) averages 9%, with breathtaking views but brutal gradients.

At 1,880 m, a barrier marks the final stretch toward the summit, officially closed due to rockfall risks beneath Mangart’s towering cliffs. However, many riders continue at their own risk, and the panoramic views at the top are truly unmatched. The saddle is also a popular launch point for paragliders.

The descent back is highly technical, with narrow roads and summer traffic, requiring extra caution. Riders rejoin Predil Pass before a fast descent through Log pod Mangartom and past Fort Kluže, leading back to Bovec.

This route is a cycling masterpiece, blending brutal climbs, thrilling descents, and jaw-dropping scenery, making it an unforgettable challenge for any serious cyclist.