Boise River Marathon

Boise River Marathon takes place in Boise, Idaho, on May 2, 2027, on a flat, fast out-and-back course along the Boise River Greenbelt, past natural scenery and local golf courses. The marathon (26.2 miles) starts at 6:30 a.m., the half marathon (13.1 miles) at 8:00, and the 10K and 5K at 9:00.

Flat and out-and-back is the friendliest profile there is for pacing: you see the leaders coming back, you know exactly where halfway is, and you can hold one effort the whole way. That makes it a sensible choice for a first marathon or a personal-best attempt. The atmosphere is family-oriented, with post-race food, vendor booths and local business partners at the finish.