In 298 days · Sun, Jul 11, 2027
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Sunday, July 11th, 2027
Varney Bridge Fishing Access Site, Ennis MT
Marathon · Half · Ultra
51–80°F · low rain risk
See last 10 years
On this date: rain 0 of the last 10 years
2026
56–89°F
dry
2025
50–70°F
dry
2024
55–91°F
dry
2023
51–80°F
dry
2022
49–73°F
dry
2021
51–88°F
dry
2020
50–82°F
dry
2019
50–82°F
dry
2018
56–74°F
dry
2017
50–76°F
dry
Best months to race in Montana →
About this race
Race Overview
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.
Course Update for 2027
- Course Improvement: In 2027, we have eliminated the out and back loop to/from Highway 287.
- Garmin Link: The updated course is now public on Garmin: Garmin Course Link
Half Marathon Option
- Distance: An exciting half marathon option is available.
- Garmin Link: Course details can be found here: Half Marathon Course
50K Challenge
- Supersize your Day: Join us for a challenging 50K race.
- Garmin Link: Course details are available at: 50K Course
Awards and After-Party
- Prizes: Awards are given to the first and second place male and female finishers.
- After-Party: Join us at the after-party at Varney Bridge for local brews and bites.
Race Details
The Big Sky Marathon will take place on 2027-07-11 at Varney Bridge Fishing Access Site, Ennis, MT. For more information, visit Big Sky Marathon.
Course map
Hotels for race weekend
Live prices near the start line, Jul 10 – 12, 2027.
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