2021 Event

I hope everyone is staying safe and healthy in this new year.  I'm sure that, like me, you are hoping for running and racing to start getting back to normal.  

This year, we hope to hold our 9th Cuyamaca 100k Endurance Run on Saturday, October 2nd.

We will open registration on April 1st, and it will likely be conditional registration.  This means we will open with an ordered waitlist and add runners officially once State Parks are accepting permit applications.

Please check back here, or on our Ultrasignup, Instagram, or Facebook pages for updates on the current situation.




Cuyamaca Outdoor School
Since 2012, the Cuyamaca 100k has benefited from the support of the Cuyamaca Outdoor School.  The venue and facilities that host our race are home to a 6th grade camp program that has inspired the love of the outdoors in thousands of students over the course of the 70+ years.  Please join us in supporting the outdoor education of San Diego's youth at sixthgradecamp.org.

San Diego Ultra Slam
The RD's of San Diego's mountain ultra races have put together a special award for those runners who complete four races of each iconic ultra distance; 50k, 50 miles, 100k, and 100 miles. Please visit sandiegoultraslam.com for more information.