Frequently Asked Questions
How long is each course, and how much elevation is gained/lost?
100-mile race is 104.4 miles and over 16,000 feet (Ō.) of climbing.
50-mile race is 54.6 miles and over 8,500 Ō. of climbing.
Sorini 25 is 29 miles and around 4,000 Ō. of climbing.
What are the Cutoff Times?
Cutoff Times are final. If you do not make it to the aid stations by
these times, you will not be allowed to continue. These are set to ensure your safe completion of the race and to be respectful of the volunteers, including aid station volunteers and search
and rescue. NO EXCEPTIONS. ANY RIDER BEING ABUSIVE TO A VOLUNTEER(S) FOR MISSING THEIR CUTOFF TIME WILL NOT BE ALLOWED TO RACE AT THE BUTTE 100/SORINI 25 IN THE FUTURE.
Butte 100 cutoffs:
1. Aid Station 5: 2:00:00 p.m.
2. Aid Station 8: 6:00:00 p.m.
3. Aid Station 9
7:30:00p.m. without a light, or
8:00:00 p.m. with a light. A sufficiently bright bikelight is required to ride at night after 7:30 p.m. to pass Aid Station 9m .If you are unsure if you can make the 7:30 p.m.cutoff time, please feel free to bring a flashlight.
Butte 50 cutoffs:
1. Aid Station 3: 5:00:00 p.m.
2. Aid Station 4: 7:00:00 p.m.
If you do not make the cut-off, you are no longer a part of the race and a ride back to the start/finish will be arranged. If you make the decision to proceed:
You assume your own responsibility.
You are no longer covered under the Butte 100 umbrella and must find your own ride
Back to the start/finish line if you take this risk and proceed.
If you need a rescue, you will need to call Search and Rescue and assume any associated liabilities and/or costs.
How do Drop Bags work?
For each drop bag, use a 1-gallon ziplock bag and mark it with your number and aid station. Drop bags will be placed in bins at the racer meeting on Friday, July 18th at 6pm Registration begins at 3:00pm. Each bin will have
an aid station and mile marker to know where you need to place your bag.
Sorini 25 racers: can drop bags for Aid Station 1 and 4
Butte 50-mile racers: can drop bags for Aid Stations 1, 2, 3, and 4.
Butte 100 mile racers in 2025, the following aid stations are at the same location.
1. Aid Stations 1/6
2. Aid Stations 2/7
3. Aid Stations 3/8
4. Aid Stations 4/9
For 100-mile racers, at the racer’s meeting there will be drop bins for Aid Stations 1 through 9.
You may place one drop bag at each aid station.
NOTE: Aid station 5 is for Butte 100 riders only between lap 1 and 2. DO NOT go over the timing mat after the starting loop (mile 4.8).
Only Butte 100 riders will cross the timing mat AFTER completing the first lap (54.6 miles).
What should I put in my Drop bags?
Nutrition,
Pickle Juice--we will have some at some of the aid-stations . Electrolytes,
Solid foods (energy bars, waffles, etc.)
Bike maintenance items:
Chain Lube, Tube, CO2 cartridges, etc.
Comfort items:
Sunscreen,
Fresh socks and/or shorts
Chamois cream,
Sunglass wipes,
Advil, other?
Please note that aid station bags will be outside in the elements and may get hot/cold/wet/etc.
As such, please do not include anything that may spoil before you are able to use it (i.e., pre-
mixed drinks, fruits, vegetables, etc.) unless you have placed them in an appropriate cool and/or protective container
What kind of tires should I use?
Decomposed granite with sandy areas in the beginning of the course and on the Basin Creek climb.
After Basin Creek, the course gets rocky and technical. A good fast rolling, high volume tire is a great option. Tires similar to Maxxis Rekon, Rekon Race, Ardent, and Aspen (risking punctures). Schwalbe Nobby Nic, Wicked Will, Racing Ralph. Vittoria Aggaro, Mezcal
What will be available at the aid stations?
All Aid stations will have water for riders and will be double stocked (for the two laps) with HAMMER NUTRITION, Coca-Cola (aid station 2,3,7,8), Pickle Juice, and some fruit.
In addition, two new water stations will be located between Aid Stations 2 and 3 (at the top of Basin Creek climb) and Aid Stations 7 and 8 (where the CDT crosses Lime Kiln Road). These new
water stations will only include water.
