Which Montana cities have the most ultramarathons?
West Yellowstone (2), Ennis (1), Seeley Lake (1), Butte (1) lead the state for Ultra races. Those give you the most dates to choose from if your schedule is tight.
Montana · Ultra
2027 Ultramarathons in Montana
Every upcoming Ultra in Montana, all 5 of them, sorted by date. Dates, entry fees, finish-time stats from past results, and start-line maps.
5 upcoming ultramarathons · 4 with finish-time stats
By the numbers
The Biggest and Longest-Running
The Montana races that stand out on the numbers: the biggest field, and the longest unbroken run of editions.
Montana Ultramarathons by City
The Next Ultra Marathons in Montana
5 total Sat, Jun 26, 2027Yellowstone Park Trail Races West Yellowstone, MTFrom $80Details Sun, Jul 11, 2027Big Sky Marathon Ennis, MTFrom $110Details Sat, Jul 17, 2027Bob Marshall Trail Races Seeley Lake, MTFrom $80Details Sat, Jul 31, 2027Yellowstone Park Trail Races West Yellowstone, MTFrom $85Details Sat, Sep 25, 2027The Divide Trail Race Butte, MTFrom $80Details
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 Oct 25, 2026.
Common Questions About Running an Ultra in Montana
When are most ultramarathons held in Montana?
July is the busiest month for Ultra races in Montana, with 3 of the 5. If you are flexible on the date, that is the quickest way to narrow things down.
Are there trail Ultra races in Montana?
Yes, 3 races around Montana get you off the pavement: 3 are trail races.