Trail running course through mixed terrain in Grand Est, FR
Trail Alsace by UTMB

Trail Alsace by UTMB 18K

18K·Obernai, France
mountaintrailqualifier

AI-generated image

Distance18K
Date15 May 2026
Difficulty3/5

About This Race

The Trail Alsace by UTMB 18K offers runners a focused introduction to the Alsatian vineyard trails that define this corner of northeastern France. Part of the UTMB World Series, the race starts from the medieval town of Obernai, where half-timbered houses and cobblestone streets give way to wooded paths and vine-covered hillsides. At 18 kilometers, this distance provides enough challenge to feel accomplished without requiring the multi-hour commitment of the event's longer formats. The course navigates the lower slopes of the Vosges Mountains, where the terrain shifts between smooth vineyard paths and more technical forested sections. Runners pass through small wine villages that have anchored this landscape for centuries, with the route designed to showcase both the natural beauty and cultural heritage of the Alsace region. The mixed terrain requires basic technical skills but remains accessible to runners stepping up from road racing or looking to build experience before tackling more demanding mountain courses.

Starting in Obernai, the route heads into the vineyards that blanket the eastern slopes of the Vosges. The course follows a mixture of wide vineyard tracks and narrower forest trails, with the terrain varying throughout. Runners should expect both runnable sections through the vines and more technical passages where roots and rocks require attention. The route returns to Obernai after a tour through the surrounding countryside, finishing in the town center where UTMB World Series events traditionally create a festival atmosphere.

Location

Practical Info

Weather

Mid-May in Alsace typically brings mild spring conditions with temperatures ranging from 10-20°C (50-68°F), though rain showers are common and mornings can be cool.

Accommodation

Obernai offers hotels and guesthouses suited to various budgets, with additional lodging available in nearby Strasbourg (25km north). Book early as UTMB World Series events draw international fields.

Best For

ultra runnersexperienced trail runnersinternational travelers

Other Distances at This Event

10.5K

The course weaves through mixed terrain characteristic of the lower Alsace foothills. Runners encounter vineyard trails, forest paths, and occasional village sections that define the region's topography. Specific elevation details have not been published, but the route maintains the rolling character typical of wine country terrain rather than steep Alpine climbs.

29K

47K

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.

109K

The route traverses the limestone and sandstone trails of the Northern Vosges, moving between dense forest sections and open vineyard country where runners pass beneath medieval castle ruins that mark territorial boundaries dating back centuries. Terrain varies from well-maintained forest roads to technical rocky sections requiring careful foot placement, particularly when conditions are wet. The course connects multiple villages where local support and cultural immersion add dimension to the physical challenge, with aid stations typically featuring regional specialties alongside standard ultra nutrition.

156K

5,100m gain

The flagship 156-kilometer ultra presents the ultimate test with 5100 meters of elevation gain across the Alsace region. This formidable challenge rewards finishers with four Running Stones and represents one of the most demanding experiences in the UTMB World Series network.