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Cuyamaca 100K

Name: Cuyamaca 100K
Start: 2025-10-04
End: 2025-10-04
Location: Descanso

Descanso, United States • 4 Oct 2025

The Cuyamaca 100K is an endurance running event set in Cuyamaca Rancho State Park, located about an hour east of San Diego, California. The course features three distinct loops, starting and ending at Camp Cuyamaca, with minimal backtracking. The first loop spans 31.5 miles and includes a climb to Cuyamaca Peak, the park's highest point. The second loop covers 12.6 miles near Oakzanita Peak, while the final 18.3-mile loop offers breathtaking views along the Pacific Crest Trail. The event encourages volunteer participation and aims to provide a challenging yet scenic experience for runners. Visit the organization's website for the most recent information.

United States California Descanso

Race information

Website Registration

100 km

6500 m+

100k

Visit the organization's website for the most recent information.

Trail runs nearby

Saturday Apr 26

Ramona Wine Country 5K

Ramona - 20 mi from Descanso

1 mi

5 km

The Ramona Wine Country 5K is an exciting running event held at BackCountry Gardens in Ramona, California. Participants can choose between a two-loop 5K course or a single loop option, featuring trails, hills, and natural obstacles. The event also includes a Charity Beer Mile, where participants dri..

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UTMB Index

Saturday May 17

Corral Canyon Trail Scramble

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Fri - Sat Jun 6-7

San Diego 100

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Saturday Jul 12

The Peak

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13 mi

26 mi

50 km

The Peak is an exhilarating running event featuring a 50K, marathon, and half marathon, set against the stunning backdrop of Cuyamaca Peak in San Diego County. Participants will experience challenging climbs and descents, with the 50K and marathon routes featuring a significant elevation gain of 10,..

Saturday Sep 6

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15 km

50 km

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