2018 registration opens December 1, 2018! Click here to view on UltraSignup.
In light of the high DNF rate on this demanding course, we have increased the qualification standards, now requiring all registrants to complete a trail race of at least 50 miles and 7,000′ of climbing. The qualifying race must be run after January 1, 2016 and prior to registration for the 2017 Castle Peak 100k. Click here for a list of suggested races.
Heads up for registration :: We need your belt size in inches (even numbers) so that we can craft your finisher’s belt. Method 1: Use your pants waist size plus 1 inch. Method 2: Measure a belt you currently wear. Measure from where the buckle attaches to the belt (leather wraps around the buckle) to the hole you are currently using.
December 1, 2017 – July 17, 2018: $175
July 18, 2017 – August 17, 2017: $195
Until July 17, 2018: 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).
July 18 – August 17, 2018: 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.