Half Marathon races near Idaho Falls

Idaho Falls Training Notes

Idaho Falls hosts 2 Half Marathon races in 2026 within 80 km of the city centre — upcoming dates, recurring series, and other races nearby, all in one place.

Idaho Falls runners keep the Snake River close, then stretch the legs on Nature Park and the local race routes. The Snake River Greenbelt loop is 23 km and gains 61 m, so it works well for steady Z2 or a longer base miles day. The Freeman Park Loop is 24 km and climbs 939 m, so locals respect it. 49 km. Local runners seem to orbit races more than named run clubs here. Idaho Falls Marathon & Half anchors the calendar, with Idaho Falls FireKracker 5k and To Bone and Back Relay in the mix.

Idaho Falls riders have a small scene, and the regular names are Geezers on Bikes, Eagle Rock cycling, and Fitzgerald's. Geezers on Bikes runs normal weekly rides on Tuesdays, and some of those old men can move though. Fitzgerald's does Thursday night group rides, and Eagle Rock cycling is the one locals find on Instagram. The HeART of Idaho Century Ride gives the road crowd a hundred miles of Marsh Valley riding, more gran fondo than crit. Gravel routes around Idaho Falls give cyclists room for base miles. The climbs mostly feel like mild climbing and headwinds, and a 16-19 mph average fits that kind of day.

Idaho Falls gets its best rhythm when warm summer settles in and both runners and riders can stack steady weeks. Summer brings Snake River runs, Nature Park miles, Thursday rides from Fitzgerald's, Tuesday Geezers on Bikes rides, and longer efforts like The HeART of Idaho Century Ride. Locals still keep a layer handy because mornings can feel a little chilly. Winter changes the job for both sports. Cold winters make runners pick their footing and keep intervals honest, while cyclists shift toward shorter outdoor spins, gravel when it is clean, and patience until the group rides feel normal again.