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Big Sky Marathon

Name: Big Sky Marathon
Start: 2027-07-11
End: 2027-07-11
Location: Ennis

Ennis, Montana, United States

calendar_today 11 Jul, 2027

directions_run Running

language Official Website

sell $80.00 – $110.00

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

Big Sky Marathon (Ultra 50K)

Jul 11, 2027

straighten

Distance — 50K

terrain

Type — Running

timer

06:30

sell

$110.00

Big Sky Marathon (Full)

Jul 11, 2027

straighten

Distance — 42.2K

terrain

Type — Running

timer

07:00

sell

$100.00

Big Sky Marathon (Half)

Jul 11, 2027

straighten

Distance — 21.1K

terrain

Type — Running

timer

09:00

sell

$80.00

Weather History

These values represent the 3-year monthly averages for July in Ennis.

thermostat Temperature

13.1° / 27.7°

wb_sunny Feels like

11.1° / 25.1°

light_mode Avg sunshine hours

14h 11m

water_drop Avg rainfall

0.3 mm

ac_unit Avg snowfall

—

air Avg wind speed

7.5 km/h (Light breeze)

opacity Sweat loss rate

Moderate

terrain Course conditions

Hard and dry surface

sunny Max UV Index

Moderate (5.6)

humidity_mid Humidity

45.9%

wb_twilight Sunrise

05:54

nightlight Sunset

21:09

About Ennis

Learn more about the host city, Ennis.

Ennis is the county town of County Clare in Ireland. It's a market town with several historic and religious sites. It also has accommodation and other visitor amenities, and is the public transport hub for the county. In 2022 its population was 28,000.