Since 2012, the Cuyamaca 100k Endurance Run has been providing runners with a scenic 100 kilometer running challenge.  The course traverses a diverse landscape of oak woodlands, meadows, pine forests, and chaparral in the Cuyamaca Rancho and Anza Borrego Desert State Parks.

The 2023 event is scheduled for Saturday, 10/7.



Cuyamaca 100K Summer Training Runs

Training Run #1

7/8 Loop 1, Part 1

Start at 7AM at Green Valley’s Arroyo Seco Picnic Area.  Run to the Harvey Moore Trailhead and join the Loop 1 course.  Follow the course through the first 2 aid stations. Approximately 13 miles.

https://www.strava.com/activities/5512418454 (this route starts from Sweetwater instead of Green Valley, but is otherwise the same)

Training Run #2

8/5 Loop 2

Start at 7AM at Green Valley’s Arroyo Seco Picnic Area.  Run to the Harvey Moore Trailhead and join the Loop 2 course.  After completing the loop, return to the start of the run. Approximately 14 miles.

Training Run #3

8/27 Loop 1, Part 2

Start at 7AM at Green Valley’s Arroyo Seco Picnic Area.  Follow the loop 1 course out of the campground and to the Sweetwater Parking area, then cross the road and head back to Green Valley. Water us available at Paso Picacho campground, 14 miles into the run. Approximately 20 miles.

https://www.strava.com/activities/7710540254

Training Run #4

9/3 Loop 3

Start at 7AM at the Sunrise Trailhead.  Follow the Loop 3 course.  Water is available 11 miles into the run at Camp Cuyamaca. 18 miles.

https://www.strava.com/activities/7749635238

All are welcome to join us at our training runs and post-run picnics.  The runs will be minimally marked, so please familiarize yourself with the route and consider carrying a map or turn by turn directions.  You are responsible for your own safety.

For maps and gpx files, see the course description page of the website.

Runner FInishing Loop 2, awards for top 3 runners, right and above, photos by Ilian Moctezuma




Teresa Kaiser descending from Cuyamaca Peak, photo by Paksit Photos.


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.
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Cuyamaca 100k is a proud supporter of Runners for Public Lands, a nonprofit focused on climate action, sustainability practices, the protection of public lands, and equitable access to nature.