Big Sky Marathon
Big Sky Marathon is a running race on July 11, 2027 in Ennis, MT, with entry fees from $75 to $100.
- Date
- July 11, 2027 (272 days to go)
- Price
- $75–$100
- Sport
- Running
From the Organizer
The Big Sky Marathon is a high-altitude, downhill quad-burner that descends the Gravelly mountain range en route to the Blue-Ribbon Madison River. Racers log a total descent of nearly 4,900 feet at finish, and a net descent of over 3,800 feet. The inaugural year was 2015, and the BSM has quickly become our most popular test. Ninety-six percent (96%) of the trek is on unpaved, packed and loose gravel.
WE HAVE IMPROVED THE COURSE FOR 2027, ELIMINATING THE OUT AND BACK LOOP TO/FROM HIGHWAY 287, AND THAT COURSE IS NOW PUBLIC ON GARMIN: https://connect.garmin.com/app/course/506792996
And, the half marathon option: https://connect.garmin.com/app/course/506794019
Or, supersize your day with 50K: https://connect.garmin.com/app/course/507504785
Prizes are awarded to the first and second place male and female finishers. Please stay for the after-party at Varney Bridge while Ultra 50K, full marathon, and half marathon registrants all commiserate together over local brews and bites.
Events
Typical Conditions
It's too far out for a forecast, so here's what weather on this date is normally like in the area. A race day forecast will replace this as race week approaches.
Typical High
82°
Typical Low
45°
Chance of Rain
28%
Based on US Climate Normals data from Ennis, 2 mi from the venue.
About Ennis, MT
Nearest Airport
BZN
Bozeman Yellowstone International Airport · 39 mi
Time Zone
Mountain Time
From Endurance Grid
Line up lodging and travel early to lock in your race weekend.
Race Location
What Are You
Waiting For?
Every finish line starts with a single decision. Claim your spot at Big Sky Marathon, put it on the calendar, and turn “someday” into a start date.
272
Days to train
- Race
- Big Sky Marathon
- Date
- July 11, 2027
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About This Sport
Endurance Grid is here to help you understand the sport, decide if it’s the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer’s event page.
With running, there's a distance for every fitness level, a community at every start line, and nothing beats the feeling of crossing a finish line you trained for.
Running is an endurance sport that rewards consistency, and showing up every week compounds in ways that will surprise you.
Running
From 5K to marathon, running races are an accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
More Running races near Ennis, MT
Frequently Asked Questions
What is the Big Sky Marathon?
When and where is the Big Sky Marathon?
How do I register for the Big Sky Marathon?
Big Sky Marathon
Jul 11, 2027