The Castle Peak 100k is arguably one of the most difficult trail races in the country. Masked by its spectacular beauty, this is a true mountain race unlike any other on the ultra-running circuit. A rare point-to-point course offering genuine support with fully stocked Aid Stations that is staffed by Truckee/Tahoe locals and experienced ultra-running volunteers. The race starts near the historic Emigrant Trail in Truckee, California at the Prosser Family Campground before ascending (and descending) over 15,000' at an average elevation of 7,300' above sea level. The course travels over roughly 95% of demanding single-track trails, while journeying through some of the most dramatic scenery and vistas the region has to offer.
The course will take you through the Tahoe National Forest, Tahoe Donner, and Euer Valley, prior to climbing Hawk's Peak. Traversing along the Donner Lake Rim Trail you'll enter the hidden beauty of the Warren Lake Loop before summiting Basin, Castle & Andesite Peaks. You'll then enter the notorious Hole in the Ground trail, exiting into the famous Royal Gorge Cross Country Resort, then ascending and running along Razorback Ridge. Enter the infamous Palisades!* By way of Crow's Nest, this 1.25 mile section of scrambling, requires true grit. After your test of courage, you'll arrive at the summit of Mt. Lincoln and Judah, before your final descent into the finish at Sugar Bowl Resort. Click here to view all the details on the Castle Peak 100k website. *All course specifics are subject to change pending final permits.
Castle Peak 100k is produced by the Donner Party Mountain Runners, an all-volunteer non-profit organization. Thank you for supporting our mission to inform and inspire mountain runners in Truckee-Tahoe. We will be hosting course preview runs throughout the summer.
2018 Castle Peak 100k finishers earn 5 points towards 2019 Ultra-Trail du Mont-Blanc® qualification.
Please be advised, the 1.25-mile Palisades section includes very technical, risky & exposed scrambling. This may not be appropriate for those with a fear of heights.
Refund / Cancellation Policy
Until July 31, 2017: If there are runners on the wait list available and willing to accept an entry, we will offer a cash refund of 75% (less UltraSignup fees).
Local time: 9:59 AM
August 1 - 15, 2017: If there are runners on the wait list available and willing to accept an entry, we will offer a 50% credit for the 2018 Castle Peak 100k.
If we do not have runners on the waiting list available and willing to accept an entry, then unfortunately we are unable offer any refunds or credits.
Registration is non-transferable. Each runner must run with a bib assigned to their name. If we must cancel the event due to natural disaster (forest fire, blizzard, etc), we will roll your registration to the following year.