2021 Event

Today, 5/10, we will begin inviting runners to register officially.  Waitlisted runners will be invited in the order in which they were added.  After reaching capacity, remaining runners will continue to be waitlisted until such time as space is available.  


Thanks for your patience and understanding as we have all been working through this challenging time!




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.