The 2026 race date is set for Saturday March 14th!
Welcome to the Tanana River Challenge.
The Tanana River Challenge (TRC) is an endurance race which includes runners, skiers, skijorers, and bikers. This year the race course loops around the mighty Tanana River and Rosie Creek forest, where you can choose between 25 and 45 miles distances.
Our event is a reincarnation of the much-loved Equinox Ultra-Ski 100k Challenge which went from Nenana to Fairbanks and was run for many years by Audun and Sally Endestad of Fairbanks. We’ve updated it to include more modes of travel, multiple aid stations run by our great volunteers, and have embraced new course routes.
Registration opens Wednesday January 1, 2026 at 12am
Standard registration (until March 1st): 45mile ($85), 25mile ($65)
Late registration (March 2nd - March 11th): 45mile ($105), 25mile ($85)
Race day registration (March 14th in person at registration table): 45mile ($125), 25mile ($105)
Event's current local time: 4:21 AM AK
