11Jul
Big Sky Marathon (Ultra 50K)
Running
- Distance
- 50K
- Start time
- 06:30
- Entry fee
- $110.00
Big Sky Marathon
Ennis,
Montana,
United States
244 days left
runsignup.com
Date
11 Jul, 2027
Races
3 distances
Entry fee
$80.00 – $110.00
Runner rating
Be the first to rate
Website
Official website
Big Sky Marathon
About the event
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.
Races offered
11Jul
Big Sky Marathon (Full)
Running
- Distance
- 42.2K
- Start time
- 07:00
- Entry fee
- $100.00
11Jul
Big Sky Marathon (Half)
Running
- Distance
- 21.1K
- Start time
- 09:00
- Entry fee
- $80.00
Weather history
3-year monthly averages for July in Ennis.
Temperature13.1° / 27.7°
Feels like11.1° / 25.1°
Sunshine hours14h 11m
Rainfall0.3 mm
Snowfall—
Wind7.5 km/h (Light breeze)
Humidity45.9%
Max UV indexModerate (5.6)
Sweat lossModerate
Course conditionsHard and dry surface
Sunrise05:54
Sunset21:09
About Ennis
Learn more about the host city, Ennis.
Ennis is a town in Madison County, Montana, United States, in the southwestern part of the state. The population was 917 at the 2020 census, up from 838 in 2010.
Read moreHotels & places to stay
Things to do nearby
Tours and activities near Ennis, powered by Viator.
Runner reviews
Read what other athletes have to say about their experience at the Big Sky Marathon.
No reviews yet
Be the first to share your experience with the community!
Suggest an edit
Spotted an error or missing detail about the Big Sky Marathon? Help us improve.
Nearby races
Explore other exciting events happening in this same region.
-
Jul 10, 2027
-
Jul 17, 2027
-
Jul 24, 2027
-
Jul 09, 2027
-
Jul 24, 2027
-
Jul 24, 2027
-
Jun 13, 2027
-
Jul 04, 2027
Recommended for you
Hand-picked events we think you’ll love.
-
Nov 13, 2026
Woods and Whites Retro Tennis Rally 2
Join us Friday, November 13th for the 2nd Annual Woods and Whites Tennis Retro Rally. This is a fun night of tennis wit…
Read more about Woods and Whites Retro Tennis Rally 2 -
Nov 21, 2026
-
Nov 26, 2026
Huffing For Stuffing
Huffing For Stuffing combines community spirit with a lively race atmosphere to improve the lives of many of our commun…
Read more about Huffing For Stuffing -
Nov 26, 2026
Turkey Day 8K, 5K Trot & 3K Fun Run
Join us Thursday, November 26 for a gobblin’ good time! The Turkey Day 8K, 5K Trot and 3K Family Fun Run courses travel…
Read more about Turkey Day 8K, 5K Trot & 3K Fun Run -
Nov 26, 2026
Burn The Bird 10k, 5k and 1.33 mile Fun Run/Walk
Dear Friends of Race Montana and Burn the Bird, It's that time of year again for the Race Montana Burn the Bird 10K, 5K…
Read more about Burn The Bird 10k, 5k and 1.33 mile Fun Run/Walk -
Nov 26, 2026
Gobble Wobble 2026
The race will start at the Plains High School at 9 a.m. Packet pickup will be at 8 am. It will be a 5k run/walk. The ki…
Read more about Gobble Wobble 2026 -
Nov 26, 2026
Jog 'n' Hog
🦃 Join us for the 4th Annual Jog ’n’ Hog 5K 2026! Join us in beautiful Washoe Park (near the tennis courts) in Anaconda…
Read more about Jog 'n' Hog -
Nov 26, 2026
Whitehall Turkey Trot
Please join us for a 5K Turkey Trot (run/jog/walk/bike - helmet required) to help support the Whitehall PTSA! Check in …
Read more about Whitehall Turkey Trot