There are 3 fat bike events, the 25, 40 and 50K. The fat bike race is the only marathon in the U.S. that features skiers and bikers on the same course on the same day! (But not at the same time: skiers start in the morning and bikers begin in the afternoon).

The 40k and 50k start on the Anchorage Hillside and traverse the city along ski and multi-use trails. Tunnels, bridges and greenbelts make it possible to ski from one end of town to the other without crossing a single road. The 25k starts in midtown (Alaska Pacific University) and ties in to the 50 and 40k courses. All races finish at Kincaid Park Stadium on the western end of the city overlooking Cook Inlet.