Birkebeiner Run 21 km 2026

Birkebeiner Run 21 km 2026 is an official amateur trail running event in Lillehammer, Norway on 13 June 2026. The official Birken page calls it Norway's largest trail run, with a half marathon course from Birkebeineren Ski Stadium to Håkons Hall through forest trails, dirt roads, and former Olympic cross-country tracks, and states that participants aged 16 and older can take part.