Idaho Falls Marathon
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Event overview
The Idaho Falls Marathon & Half is an annual road race held in Idaho Falls, Idaho. The event is organized by the Idaho Falls Marathon Foundation, Inc., a 501(c)(3) nonprofit, and has been held for the past 19 years. The race listing for 2026 shows a scheduled date of July 25, 2026, and a location at 955 Pier View Dr, Idaho Falls, ID. Race categories offered are:
- 26.2 mi (Marathon)
- 13.1 mi (Half Marathon)
- 5 km (5K)
The event listing shows multiple local sponsors and an average review rating of 3.9 based on eight reviews.
Course and logistics
All three races start and finish at Snake River Landing. The marathon route runs its first half west through southeast Idaho farm country and New Sweden, returns to the start area, then continues clockwise around the Snake River Greenbelt for the second half. The half marathon follows the Snake River Greenbelt segment used by the second half of the full marathon. The 5K course is planned near the Snake River Landing area and is listed as course TBD.
The marathon course is presented as USATF certified. Organizers describe race-day provisions including aid stations, medical support, and runner packets that include a bib number and timing chip. The event listing also notes post-race activities, volunteer opportunities, vendor booths, and charity and training program information. Visit the organization's website for the most recent information.