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Race-Day:

July 25th, 2015 6:00 AM (100 mile), 8:00 AM (50 mile), Homestake Pass parking area.

2015 Registration Fees:

100 Mile Racer Registration Fees

  • March 3: $175
  • March 4 - March 7: $200
  • March 8 - July 14: $250

50 Mile Racer Registration Fees

  • March 3: $150
  • March 4 - March 7: $175
  • March 8 - July 14: $225

Race Policy:  50% of entry fee will be refunded if you cancel before July 13th, 2015.  For a detailed race policy, click here

Butte 100

The Butte 100 is an ultra endurance mountain bike race that takes place in southwest Montana over some of the best single-track trails around!

Combined total racer cap: 250 (100 Mile = 90, 50 Mile = 160)

Cancellation Policy

A 50 and 100 mile wait list will be avaialable once registration is full.  If you cancel before July 14th, 2014, 50% of your entry fee will be refunded and your spot will be filled from the first available wait-list spot.  Transfers are not allowed.

100 Mile Course

The 100 mile course will consist of a North Loop (first 50 miles) and a South Loop (second 50 miles). There will be 10 intermediate aid stations at approximately 10 mile intervals (including the start/finish area). For a complete detailed description, click here.  The 2014 course will be the same as last year, only with a 2-3 mile starting loop to spread out racers.

50 Mile Course 

The 50 mile course will consist only of the South Loop. There will be 4 intermediate aid stations at approximately 10 mile intervals. For a complete detailed description, click here.  The 2014 course will be the same as last year.

If you have any questions, look us up at http://butte100.com/crew/

When & Where
Event Date:
Saturday, July 25, 2015  
Event Location:
Homestake Pass
Butte MT 59701

Exact Location
Location Map