When are most Half Marathon races held in Boise?
October is the busiest month for Half Marathon races in Boise, with 3 of the 9, followed by May with 2. If you are flexible on the date, that is the quickest way to narrow things down.
Idaho · Half Marathon
Half Marathon Races in Boise, Idaho
Every upcoming Half Marathon around Boise, with start times, entry fees, finish-time stats from past editions, start-line maps, and the local run clubs to train with.
9 upcoming Half Marathon races found · 6 with finish-time stats
By the numbers
The Biggest and Longest-Running
The Boise races that stand out on the numbers: the biggest field, and the longest unbroken run of editions.
Sun, Aug 23, 2026Popsicle 5K/10K/Half - Boise Boise, IDFrom $35Details Sat, Sep 26, 2026St. Luke's FitOne 5K/10K/Half Marathon Boise, IDFrom $35Details Sun, Oct 11, 2026City of Trees Marathon Boise, IDFrom $55Details Sat, Oct 17, 2026Idaho Running Day Boise, IDFrom $45Details Sat, Oct 24, 2026YMCA Halloween Run Boise, IDFrom $30Details Sat, Nov 14, 2026Boise Half Marathon Boise, IDFrom $65Details Sat, Apr 17, 2027Race to Robie Creek® Boise, IDFrom $75Details Sun, May 2, 2027Boise River Marathon Boise, IDFrom $35Details Sat, May 15, 2027YMCA Famous Idaho Potato Marathon & Fun Runs Boise, IDFrom $35Details
How we calculate these stats: RunSesh calculates these figures from the most recent published results of past editions, sourced from RunSignup. We show aggregates only: field size, winning and median times, and the cutoff. We never publish individual finisher tables. Last updated Jul 27, 2026.
Common Questions About Running a Half Marathon in Boise
How much do Boise Half Marathon races cost?
Entry fees for Half Marathon races here run from $30 to about $75, depending on the event and how early you register.
How early should I register for a Half Marathon in Boise?
6 of the 9 Half Marathon races in Boise already have a price increase scheduled, so entry gets more expensive the longer you leave it. Race pricing almost always steps up as the date approaches, and signing up early is usually the cheapest option.
Are Boise Half Marathon races beginner-friendly?
Yes, for the most part. Across the 6 Half Marathon races in Boise with published results, the typical median finish is around 2:16:34, which means half of every one of those fields came in slower than that. Recreational runners and walk-runners are the bulk of these fields, not the exception.
Where can I train for a Half Marathon in Boise?
Browse Boise run clubs on RunSesh to find a training group at your pace.