Due to construction by San Diego Gas & Electric on the paved road to Cuyamaca Peak, we are unable to have an aid station at the top of the peak.  The course has been rerouted and there will be an aid station at the West Mesa turn out on CA-79 at the bottom of the West Mesa Fire Road.  

Please see this map for the revised portion of Loop 1 and the revised turn by turn directions for details.  The reroute is between the 2nd aid station (Green Valley) and the 4th aid station (Paso Picacho).

.GPX file for the reroute section
Ultrapacer map of the complete course including revision, thanks to Danny Murphy!

The West Mesa Aid station will open at 9 AM and the new cutoff will be 1:30 PM.
This will allow 90 minutes to traverse the mostly uphill 5.7 miles to Paso Picacho.  

This is a NO CREW ACCESS aid station due to lack of parking space and high traffic road crossing. 

The majority of the Cuyamaca 100k course lies within the boundaries of Cuyamaca Rancho State Park approximately one hour east of San Diego.  The course consists of three distinct loops, all of which start and end at Camp Cuyamaca off of Highway 79.  Each loop covers a different set of trails with minimal back tracking and repetition.  The first and longest loop of 32.3 miles traverses the western side of the park from south to north and summits of the park's high point, Cuyamaca Peak, at 6500'.  The second loop is 12.6 miles, and takes in the southeast corner of the park near Oakzanita Peak.  The final loop of 18.3 miles brings runners through northern section of the park, briefly leaves the park and enters Anza Borrego, and travels along the PCT overlooking spectacular desert views, before returning to Cuyamaca's northern meadows and returning south to the finish.

.gpx files:

Course Maps and Elevation Profiles

Total Elevation Gain/Loss:  8,800'