About This Race
The 47K at Trail Alsace by UTMB offers 1,500 meters of elevation gain through the vineyard-covered foothills of the Vosges Mountains, based in the medieval town of Obernai. Part of the UTMB World Series, this course delivers the technical variety that defines Alsatian trail running—steep vineyard climbs on narrow paths between vines, forested singletrack through beech and oak, and passages through half-timbered villages where cobblestone transitions test tired legs. The distance sits in that sweet spot for experienced trail runners: long enough to demand respect and proper pacing, short enough to finish comfortably in daylight hours. The terrain requires technical competence—vineyard sections can be slick and uneven, forest descents demand focus—but the effort-to-reward ratio is excellent. Most runners finish in six to eight hours, allowing time to actually enjoy the medieval architecture and valley views rather than grinding through darkness. The May timing means stable spring weather and vineyards beginning their green phase, though afternoons can warm quickly on exposed slopes. As part of a weekend featuring multiple distances, the race carries the organizational polish expected from UTMB events while maintaining the intimate character of a regional trail race in rural Alsace.
The course circles through the Alsatian wine country surrounding Obernai, alternating between vineyard paths, forest trails, and brief village passages. Expect sustained climbs through terraced vineyards where footing can be technical, with narrow dirt paths between vine rows. Forest sections provide shade and singletrack variety, typically on well-maintained trails through mixed deciduous woodland. The route includes several villages where cobblestone streets and stone steps interrupt the rhythm before returning to dirt.
Location
Practical Info
Mid-May in Alsace typically brings mild spring conditions with temperatures ranging from 10-20°C (50-68°F), though afternoon sun on exposed vineyard slopes can feel warmer. Rain possible but less frequent than earlier spring months.
Obernai offers hotels, guesthouses, and vacation rentals within walking distance of race headquarters. Book early as the UTMB weekend attracts runners across all distances. Strasbourg (25 kilometers north) provides additional accommodation options with train connections to Obernai.
Best For
Notable Features
Trail Alsace by UTMB combines the professional organization and international field of a World Series event with the distinct regional character of Alsatian wine country. The course showcases terrain unique to this corner of France—terraced vineyards, Romanesque villages, and Vosges foothill forests—rarely seen in major trail races. Obernai itself provides a remarkably scenic race base, with its medieval ramparts and central square offering more atmosphere than the typical trailhead parking lot start.