Journée sport et nature à Sallaumines is a mixed outdoor-sport day in Sallaumines, in the Pas-de-Calais department of northern France. It is listed for March, with the exact date still to be confirmed, and it groups together three early-start options: gravel biking, walking, and a 25 km short trail run, all shown with a 07:30 start.
The cycling option is a gravel ride, the walking option is a pedestrian hike, and the trail option gives runners the longest listed distance on the page. The trail entry also shows more than 60,000 meters of climbing, which is almost certainly a listing error rather than a realistic elevation figure for a 25 km race, so the useful takeaway is that this is a local multi-discipline nature outing rather than a single road race.