Butte 100 MTB Race

About the Event

Welcome to the most difficult mountain bike race in the country: The Butte 100. The Butte 100 race weekend consists of three individual races, a 100 mile, 50 mile and the Sorini 25, taking place atop the Continental Divide just outside of Butte, Montana. The race has grown from a small group of dedicated locals on a gravel road, to world-class athletes competing on world-class trails. With outstanding partnerships with the USFS, BLM, community of Butte, our generous sponsors, and the “neon army” of volunteers, the Butte 100 races continue to provide the best mountain bike racing experience possible. Thanks for visiting.

Please visit our Facebook page for updates and announcements.

Races Offered

Butte 100

Jul 18, 2026

straighten

Distance — 104.1 Miles

terrain

Type — —

timer

06:00

sell

$100.00

Tandem 100

Jul 18, 2026

straighten

Distance — 104.1 Miles

terrain

Type — —

timer

06:00

sell

$100.00

Butte 50

Jul 18, 2026

straighten

Distance — 54.6 Miles

terrain

Type — —

timer

07:00

sell

$135.00

Tandem 50

Jul 18, 2026

straighten

Distance — 54.6 Miles

terrain

Type — —

timer

07:00

sell

$135.00

Sorini 25

Jul 18, 2026

straighten

Distance — 29.6 Miles

terrain

Type — —

timer

08:00

sell

$100.00

Tandem 25

Jul 18, 2026

straighten

Distance — 29.6 Miles

terrain

Type — —

timer

08:00

sell

$100.00

Weather History

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

thermostat Temperature

10.1° / 25.5°

wb_sunny Feels like

8.4° / 21.8°

light_mode Avg sunshine hours

14h 4m

water_drop Avg rainfall

0.6 mm

ac_unit Avg snowfall

—

air Avg wind speed

6.9 km/h (Light breeze)

opacity Sweat loss rate

Moderate

terrain Course conditions

Firm and slightly soft

sunny Max UV Index

Moderate (5.6)

humidity_mid Humidity

47.8%

wb_twilight Sunrise

05:56

nightlight Sunset

21:15

About Butte

Learn more about the host city, Butte.

Butte is one of the major towns in Montana, with a population of 35,000 (2020). In its heyday between the late 19th century and about 1920, it was one of the largest and most notorious copper boomtowns in the American West, home to hundreds of saloons and a famous red-light district.