Predel is a mountain pass at an elevation of 1.156m (3,793ft), located in the Julian Alps, on the border between Italy and Slovenia.
The roads to reach the summit are 203 in Slovenia and Strada Statale 254 in Italy. Both are asphalted. The pass connects Cave del Predil, part of the Italian municipality of Tarvisio in the northwest, with the municipality of Bovec in the Upper Soča (Isonzo) Valley in Slovenia.
This infamous road is tightly hairpinned and bumped, an exquisite winding mountain drive with sharp and blind curves and hairpin switchbacks leading the traveler over the mountains. The road over the pass has been a major trade route since at least Roman times. In 1903, a 4.5 km (2.8 mi) long tunnel (Štoln) was built beneath the pass, serving miners from Log pod Mangartom on their way to the lead mines in Cave del Predil.