Sean O’Brien Trail Runs is the Western States 100 Mile qualifying race. Food and beverages will be waiting for participants at the finish line.
To find more races, check out our complete USA Running Calendar.
Contents
Race Info
The top 2 men and women overall will qualify for the AC100 race. There will be 7 aid stations along the 50M course, 4 stations along the 50K course, 3 along the 30K course.
The aid stations will provide participants with sweet and salty snacks, potatoes, fresh fruit, salt tablets, electrolytes and ice. The time limit for the 50M course is 16 hours.
This is a cup-free race, so participants should bring a bottle or other hydration.
Race Date
January 25, 2025.
Location
Directions
Distances
- 100K
- 50M
- 50K
- Marathon (26.2 miles)
- 30K
Starting Time
- 5:00 AM – 100K
- 6:00 AM – 50M
- 7:00 AM – 50K, 30K, full marathon
Entry Fees
- $322 and up – 100K
- $242 and up – 50M
- $189 and up – 50K
- $162 and up – 30K
- $146 and up – full marathon
Course Map
You can find the course map and description here: khraces.com.
Registration
To participate in the Sean O’Brien Trail Runs, register here ultrasignup.com.
Official Race Website
Additional race information can be found at khraces.com.
Social Media
If you would like to keep up on the latest news, connect with the race on Facebook.
Video
Related Events
If you’re looking for more races like this, have a look at our Ultra Marathons Calendar. You may also like to participate in other races in January.
More races in California: 5K, 10K, Half Marathons, Marathons, Ultra Marathons, 50K, 50M, 100K, 100M
