Le 12 du Dolaizon is the 12.0km trail race at Trail du Saint-Jacques by UTMB 2026 (Le Puy-en-Velay, France). The race starts on June 14, 2026.
The course climbs 210m+. With 18m/km of climbing, the course is predominantly runnable. By gradient, 18% of the distance is uphill, 43% downhill and 39% flat. Surface: 57% trail, 22% road, and 17% smooth. Flat-equivalent effort: 12.7 FlatKM.
The course is runnable enough that trekking poles are not needed.
There is too little runnable descent to damage the quads: plan the race around climbing and fuelling.
On race day, start temperatures have historically ranged from 11°C to 21°C, with around 15°C at the highest point; the chance of precipitation is about 38%. Heavy rain of 10.0mm or more falls on about 8% of days around this date.
This page has a pacing and nutrition planner, a gradient matrix, an interactive elevation profile and historical weather for Le 12 du Dolaizon.
Other distances of Trail du Saint-Jacques by UTMB 2026Ultra du Saint-Jacques (134km)·Grand Trail du Saint-Jacques (81.0km)·Monistrail (54.0km)·Les Chibottes (28.0km)
Official websitetsj.utmb.world
