Trail & Skate - Fillière is a night race for pairs on the Plateau des Glières, combining trail running with skate skiing. It begins at 7:00 PM, employing a relay format with four 1.25 km running legs and four 3.5 km skating legs. The distances are manageable, yet demand genuine effort on foot and skis.
The event fosters a festive winter atmosphere: participants are invited to wear costumes, with a prize awarded for the best attire. Following the race, all participants receive a hot meal. The prize draw features a trip to Lapland as the top prize. The most recent running had 55 pairs, suggesting a close-knit local gathering rather than a large-scale competition.