Trail
50 Mile
80.5 km
Start: Mar 16, 07:00 AM
240.00 EUR
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Race month
March · 29°–48°
Field size
50,000
Distances
80.5k, 50k, 41.8k, 25k
Distances
Running
50 Mile
80.5 km
Trail
50K
50 km
1,488m
Start: 12:00 PM
Trail
25K
41.8 km
673m
Start: 06:00 PM
130.00 EUR
Running
25K
25 km
Finish-time calculator
Your finish time
Slide to your target pace — and see when you’ll hit the line.
6:00
min / km
← faster · 2:0012:00 · easier →
8:02:49
Estimated finish · 80.5 km
10 km1:00:00
5 km30:00
Where am I when? · Splits
Start
0:00
5 km
30:00
10 km
1:00:00
15 km
1:30:00
20 km
2:00:00
25 km
2:30:00
30 km
3:00:00
35 km
3:30:00
40 km
4:00:00
45 km
4:30:00
50 km
5:00:00
55 km
5:30:00
60 km
6:00:00
65 km
6:30:00
70 km
7:00:00
75 km
7:30:00
Finish
8:02:49
Estimates only · form, weather, and hills can change the result.
Course & climate
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What to expect
What makes this race distinct — for training and race day.
Every spring, trail runners from across the Mountain West and beyond gather on Antelope Island for the Buffalo Run. With sweeping views of the Great Salt Lake, rolling singletrack through desert grasslands, and herds of wild bison roaming the course, the event blends natural beauty, community, and adventure into one unforgettable endurance event.
The field
50,000
Catering & aid stations
On-course food and drink available at aid stations: White Rock Bay (mile 2.8), Elephant Head (mile 8.3), plus additional stations along the course.
Pacers
Pacers will run with the lead waves at the Buffalo Run Spring Classic to help participants hit target times—see the event schedule for pacer assignments by start wave. Pacer flags will be displayed at key points on course.
What does it cost?
| 50 Mile | 240.00 EUR |
|---|---|
| 25K | 130.00 EUR |
What's included in entry
- 25K
- 50K
- 50 Mile
Stay & get to the start
Getting there
Assumed starting point
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Estimating travel…
Hotels near the start
Results
Official finisher lists are published by the race organiser.
View official resultsFAQ
Do you have a refund policy?
If a registered runner is unable to attend, they may cancel their entry and receive a partial refund in the form of race credit. We do not provide full refund due to the non-recoverable expenses that go into race preparation. Refund amounts are determined by the date of withdrawal and follow this tiered structure. You will also have the option of purchasing insurance who you can work with to receive a full refund at any point. This will protect both us and you from any non-recoverable costs. 120+ days before race day: 75% refund 90-119 days before race day: 50% credit 60-89+ days before race day: 25% credit Less than 30 days before race day: No credit available. We only offer full refunds under special circumstances such as, pregnancy (see below).
Will there be a waitlist?
Yes! Waitlists will be added to all 2026 events.
Do you have a pregnancy DeFeRral Policy?
Yes! No questions asked. We’ll work with you on a refund or defer your entry to a different year/event. This policy extends to both partners and applies if: They adopt a child under the age of 5 in the time between the runner entering the race and the deferral deadline.The runner or their partner becomes pregnant after entering the race.The runner or their partner gives birth to a child in the time between the runner entering the race and the deferral deadline.
Do you have a non-binary and or Transgender Category?
Transgender and non-binary runners are encouraged to participate! We will accept every transgender and non-binary runner’s self-declared gender category at registration and no one may challenge a runner’s self-declaration.
How do I change my Race distance?
You have the ability to move from one distance to another prior to the event. If you would like to downgrade to a shorter distance, you can, but you will not receive a refund (and cannot change it back on your own). If you would like to upgrade, your original order is removed and you will be issued a credit to re-register for another distance, AT THE PRICE OF THE OTHER DISTANCE ON THE DATE OF THE ORIGINAL ORDER. You will be directed to re-register.
Are your races new parent friendly?
All of our races have a pregnancy deferral or refund policy. Twisted Fork will provide heavily subsidized Child-Care. Visit our Child-Care program page for more information. At this time, the Antelope Island Races will not have childcare.
Will volunteers receive anything for their time?
You’ll receive a race voucher and hugs from the Race Directors <3. Visit our volunteer page for more information.
Do you have Race scholarships?
Yes! To apply, navigate to our scholarships page for the current application and application deadlines.
Last updated: Jun 5, 2026, 11:41:37 PM
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