When are most Marathon races held in Boise?
October is the busiest month for Marathon races in Boise, with 2 of the 4, followed by May with 2. If you are flexible on the date, that is the quickest way to narrow things down.
Idaho · Marathon
Marathon Races in Boise, Idaho
Every upcoming 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.
4 upcoming Marathon races found · 3 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.
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 Marathon in Boise
How much do Boise Marathon races cost?
Entry fees for Marathon races here run from $35 to about $55, depending on the event and how early you register.
How early should I register for a Marathon in Boise?
2 of the 4 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 Marathon races beginner-friendly?
Yes, for the most part. Across the 3 Marathon races in Boise with published results, the typical median finish is around 4:29:45, 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 Marathon in Boise?
Browse Boise run clubs on RunSesh to find a training group at your pace.