Vangsåsen opp - ritt 1 is the first event in a two-part Norwegian cycling series using the same approximately 20 km course from Trehjørningen to Gåsbu. Both events begin in the evening, offering participants an opportunity to ride the route once, then return a few weeks later to attempt to improve their previous time.
The start is located by Mesta and Statens Vegvesen at Trehjørningen, shortly after Nærmokrysset. The course proceeds along Fv 60 past Vårtun, turns at Lier, and proceeds on a forest road towards Puttsjøen. It then ascends Fjellvegen before descending back to Gåsbu, with the finish line situated within the initial cabin area. Categories adhere to Norwegian Cycling Federation regulations, ensuring the event is conducted as a formal bike race.