17km is the 17.0km trail race at Obala Ultra Trail 2026 (Korte, Slovenia). The race starts on November 7, 2026 at 11:30 AM. It starts in Korte and finishes in Izola. The time limit is 4 h.
Short race: go all out.
The course climbs 450m+. With 26m/km of climbing, this is a rolling, mostly runnable course. By gradient, 23% of the distance is uphill, 46% downhill and 31% flat. The longest climb runs 1.1km at an average 11.5% grade (130m of vertical). The longest descent runs 6.4km at an average 4.3% grade (272m of vertical). The steepest climb averages 18.9% over 0.2km. The steepest descent drops at 27.9% over 0.3km. Surface: 50% smooth, 41% road, and 9% trail. Flat-equivalent effort: 20.4 FlatKM.
The highest summit on the course is Ronek (116m), 13.9km from the start. The course also passes close to Trmun (207m) and Vrh (188m).
The course is runnable enough that trekking poles are not needed.
Quad damage risk is low (index 8 of 100): a few descents worth noting, none of them decisive.
On race day, start temperatures have historically ranged from 10°C to 17°C, with around 14°C at the highest point; the chance of precipitation is about 42%. Heavy rain of 10.0mm or more falls on about 17% of days around this date.
This page has a pacing and nutrition planner, a gradient matrix, an interactive elevation profile and historical weather for 17km.
Other distances of Obala Ultra Trail 2026108km (108km)·64km (64.0km)·35km (35.0km)·11km (11.0km)
Official websitewww.obalaultratrail.si