Tanana River Challenge

MAR
14
2026
Read all about the Tanana River Challenge on 14 Mar 2026 in Fairbanks.
Sat 14 Mar 2026
25 Miles 45 Miles

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Tanana River Challenge

The Tanana River Challenge is an endurance race for runners, skiers, skijorers, and cyclists. It offers 25-mile and 45-mile distances. Both distances follow routes along the Tanana River and through the Rosie Creek forest. The race is a reincarnation of the Equinox Ultra-Ski 100k Challenge.

The event has a limit of 120 participants. Registration opens on January 1. Standard registration costs $85 for the 45-mile and $65 for the 25-mile distance. Late registration costs $105 and $85, respectively. Race-day registration is available at the start for $125 and $105.

The start and finish location is the Tanana Wayside boat launch off Chena Pump Road in Fairbanks. The 45-mile participants begin at 8 am. The 25-mile skijorers start at 9 am, and 25-mile skiers, cyclists, and runners begin at 10 am. All racers must check in 45 minutes before their respective start. There is a mandatory pre-race meeting 30 minutes before each start. The finish line shuts down at 7 pm.

Key rules include:

  • Racers must be self-sufficient and cannot accept outside help.
  • All racers must physically check in at all official checkpoints.
  • Racers must stay on the marked course.
  • Skijorers can run up to a maximum of 3 dogs. A pulk is optional.
  • Any racer needing evacuation will be charged a $100 fee.
  • Registration fees are non-refundable and non-transferable.

An after-race party is held at 7 pm at the Ken Kunkel Community Center. Visit the organization's website for the most recent information.

45 mi
45 Miles
25 mi
25 Miles