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.
There will be cash prizes for the overall top three men's and women's finishers in the 100 mile race. They are broken down as follows: 1st $1,000 2nd $500 3rd $250 Top three male and female 100-mile finishers also receive comp entry to the following year's event. Additional podium awards to the following (all distances): Juniors (19 and under) – Top 3 male/female Masters (age 50+) – Top 3 male/female Singlespeed – Top 3 male/female Overall (includes masters and juniors) – Top 5 m
104.1 Miles: Bike Jersey
54.6 Miles: Bike Jersey
29.6 Miles: Dri-fit T-shirt
| Distance | Price | Opens | Closes |
|---|---|---|---|
| 104.1 Miles | $100.00 | Dec 7 | Dec 11 |
| $200.00 | Dec 11 | Jul 18 | |
| 54.6 Miles | $135.00 | Dec 7 | Dec 11 |
| $175.00 | Dec 11 | Jul 18 | |
| 29.6 Miles | $100.00 | Dec 7 | Dec 11 |
| $150.00 | Dec 11 | Jul 18 |
| Year | Finishers | Median Time | Fastest Time | Median MPH | Fastest MPH |
|---|---|---|---|---|---|
| 2025 | 29 | 13:37:06 | 9:19:08 | 7.6 mph | 11.2 mph |
| Year | Finishers | Median Time | Fastest Time | Median MPH | Fastest MPH |
|---|---|---|---|---|---|
| 2024 | 165 | 6:34:07 | 4:20:34 | 7.7 mph | 11.6 mph |
| 2023 | 191 | 8:05:24 | 5:10:50 | 6.2 mph | 9.7 mph |
Interested in this race?
Download the 2025 Race Bible here.
Packet Pickup Timeline Friday, July 17th 2:00-700 p.m. Racer Packet Pick-up Butte Civic Center-Annex East Side of Building *There will be NO Pick-up taking place during the 6 p.m. racer meeting but will resume after the meeting for those arriving late 6:00 p.m. All Racer’s Mandatory Meeting (last-minute course info, safety hazards, and race rules will be discussed) Race Day Timeline Saturday, July 18th 5:45 a.m. 100-mile race roll-call: Starting Line 6:00 a.m. 100-mile race start 6:45 a.m. 50-mi
First Come/First Served We are no longer using the lottery system. Be ready to sign up when registration opens! Waiting List The waiting list is first come first served. Those racers unsuccessful in gaining initial entry will be automatically entered into the waiting list. When a slot opens up for a waitlist registrant, you have two days to complete your registration before you are removed. Racers will be contacted by email as openings are reported. Cancellations/Refunds Registration fees for Th
| 2022 | 166 | 7:25:48 | 4:41:11 | 6.8 mph | 10.7 mph |
| 2021 | 106 | 7:34:30 | 5:08:52 | 6.6 mph | 9.8 mph |
| Year | Finishers | Median Time | Fastest Time | Median MPH | Fastest MPH |
|---|---|---|---|---|---|
| 2024 | 153 | 2:42:54 | 1:48:46 | 9.4 mph | 14.0 mph |
| 2023 | 142 | 4:08:04 | 2:25:59 | 6.1 mph | 10.4 mph |
| 2022 | 110 | 4:04:12 | 2:20:39 | 6.2 mph | 10.8 mph |
| 2019 | 75 | 4:11:29 | 2:45:27 | 6.1 mph | 9.2 mph |
| 2018 | 85 | 4:25:17 | 2:46:10 | 5.7 mph | 9.2 mph |
| 2017 | 79 | 4:37:16 | 2:52:07 | 5.5 mph | 8.9 mph |
| 2016 | 208 | 6:31:54 | 2:30:57 | 3.9 mph | 10.1 mph |
| 2015 | 228 | 6:46:01 | 2:21:00 | 3.8 mph | 10.8 mph |
| Year | Finishers | Median Time | Fastest Time | Median MPH | Fastest MPH |
|---|---|---|---|---|---|
| 2021 | 33 | 11:42:11 | 8:57:16 | 8.5 mph | 11.1 mph |
| Year | Finishers | Median Time | Fastest Time | Median MPH | Fastest MPH |
|---|---|---|---|---|---|
| 2025 | 307 | 5:42:01 | 2:27:01 | 5.2 mph | 12.1 mph |
| 2021 | 102 | 4:22:29 | 2:10:20 | 6.8 mph | 13.6 mph |
| Year | Finishers | Median Time | Fastest Time | Median MPH | Fastest MPH |
|---|---|---|---|---|---|
| 2024 | 12 | 10:42:31 | 9:07:37 | 9.3 mph | 10.9 mph |
| 2023 | 27 | 12:11:52 | 9:13:11 | 8.2 mph | 10.8 mph |
| 2022 | 36 | 12:00:24 | 8:50:38 | 8.3 mph | 11.3 mph |
| 2019 | 11 | 10:41:28 | 9:08:04 | 9.3 mph | 10.9 mph |
| 2018 | 16 | 11:02:32 | 9:38:20 | 9.0 mph | 10.4 mph |
| 2017 | 14 | 11:25:45 | 10:07:35 | 8.7 mph | 9.9 mph |
| Year | Finishers | Median Time | Fastest Time |
|---|---|---|---|
| 2016 | 31 | 13:02:00 | 9:34:35 |
| 2015 | 39 | 12:26:36 | 9:41:20 |