Cuyamaca 100k Summer Training Runs


Come out and preview the course this summer before racing.  The course will be minimally marked and we will have water and ice along the route where needed.  Join us afterwards for snacks and refreshments.  All are welcome to join training runs regardless of whether you are racing, pacing, or just out to have a fun run with friends.  All runs start at 7am.


Training Run #1

Saturday, 7/26.  Combining early sections of Loop 1 and all of Loop 2.  Starting at the Sweetwater Parking area.  Approximately 19 miles. Please see the map below and the course description that follows.

The run will follow Loop 1 until after crossing Hwy 79 and descending to the Sweetwater trail intersection. We will turn right and cut off the portion of loop 1 that goes to the first aid station. Runners that don't want to miss any of the course may proceed to Merrigan Fire Road, to the aid station location, and return along Dead Horse Trail. That portion will not be marked, so please be sure you know the way. Turn by turn directions can be found on this site in the Course Description section. We'll return to the course and enter Green Valley, the second aid station, and exit along the course over the Pine Ridge trail. At Arroyo Seco Fire Road, we'll turn right and descend back toward Green Valley, and return to the Sweetwater Parking Area, where we'll start loop 2. This is about 7 miles into the run, and it is where you're parked, so no need to carry water for the entire 19. The remainder of Loop 1 will be covered in our 8/24 training run.

After returning to Sweetwater Parking Area, we'll run all of Loop 2, but we'll be picking it up at about 9.8 miles in. We'll complete the end of the loop, reaching the turn to Camp Cuyamaca in about 3 miles, then continue and finish the loop, ending back at Sweetwater once again.

The parts of the run that diverge from the official course are marked in pink on the map below.

Training Run #2

Saturday, 8/9.  Loop 3 Starting at the Sunrise Trailhead. 18.2 miles.

Training Run #3

Sunday, 8/24.  Last 20 miles of Loop 1, including the peak.  Starting at the Sweetwater Parking area. Approximately 20 miles.



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 2025 event is scheduled for Saturday, 10/4.



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.