After 34 years, we are forced to end the iconic
Sourdough Triathlon
70.3 miles of fun
the last race was held Saturday, July 19, 2025
in Chatanika, Alaska
this page remains available for those who may want to refer to it
About this race
The Sourdough Triathlon is a USA Triathlon-sanctioned half-Iron distance race held in Chatanika, AK about 45 minutes northeast of Fairbanks at Milepost 31.5 of the Steese Highway. It's a quiet area with minimal traffic and plenty of wide open spaces. The 1.2 mile swim is in a former gravel pit filled by a pristine groundwater stream. The 56 mile bike course is two laps on a quiet, paved two-lane road with the occasional vehicle passing through. The 13.1 mile run course is two laps on the shoulder of this same road. Due to the course layout, this event is very spectator-friendly. Many competitors and their families camp out at the site the night before the race in RVs or tents. Volunteers are essential!
Sourdough can only be the great experience that it is if we have sufficient volunteers. The jobs are easy: directing racers at intersections, handing out drinks, body marking, and other simple tasks. And due to the course layout, many volunteers can see the entire race from their post and cheer on family and friends. If you know anyone who’s interested, please contact Samantha Royer, [email protected]. We will be so thankful. Use this link to manage your event registration should you need to update something:
myevents.active.com/ArcticTriathlonSeries Refunds are only available to those who purchase an ACTIVE Refund at race registration. Transfers to another event are not available. The Entry Fee is How Much???
Yeah, it's a budget race. (Dare we say "cheap"?) But rest assured this is a legit, USAT-sanctioned race with a long history. There are aid stations, there are awards, every participant gets good swag. We don't have rock and roll playing or an announcer calling your name at the finish line. And there's usually zero line for the porta-potty. 
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Key Information
Registration opens Feb. 1 and will close when 50 participants have registered or at 5:00 pm AST on July 16, whichever comes first. Race distances are 1.2 mile swim, 56 mile bike and 13.1 mile run. All transitions will occur in the same area adjacent to the pond. Individual entry fees are listed below. USA Triathlon membership is also required. If you are not a USAT member you will need to buy either a one-day membership pass ($23) or an annual pass ($40 age 18-23, $60 age 24+) to participate. All participants must be at least 18 years of age by 12/31/25. Refunds are only available to those who purchase an ACTIVE Refund at race registration. Transfers to another event are not available. Note: it is not necessary to be an Active member to register. Individual: Feb. 1 - June 30 $60 July 1 - 15 $90 July 16 $120 Relays: Feb. 1 - June 30 $120 July 1 - 15 $150 July 16 $180 Each team member must have a USAT membership. Registration closes at 5:00 pm AST on July 16 We do our best to mark the course clearly, however RACERS ARE ACCOUNTABLE TO BE FAMILIAR WITH THE ROUTE.
The transition area is gravel so we will cover the ground with astroturf and carpeting. There is plenty of space in the immediate area to park cars and camp out. Port-a-potties will be available. There will be a potluck barbecue after the race. We encourage all participants to bring a dish to share and to hang around to get to know others in the triathlon community. We’ll provide the grill, burgers and brats, and condiments. Things to do in Chatanika (Steese Hwy MP 28.5)
Things to do in Fairbanks |
Xterra Discount of 60% off wetsuits and accessories. Use Discount code R-ARCTIC
