Ultramarathon

Cuyamaca 100K

Cuyamaca 100K traverses oak woodland, pine forest, chaparral and desert-edge trail near San Diego, with a 19-hour limit and live pods each October.

Race date2027 date TBD
Distance categoryUltramarathon
LocationJulian, California
Get alertsRace record updated September 30, 2026

Quick facts

  • Nineteen-hour course limit
  • Trail qualifier required for entry
  • Runner tracking pods planned for race safety
  • Oak woodland, pine forest and desert-edge trail in one race

About the Cuyamaca 100K

Cuyamaca is a standalone 100K endurance run with qualifying requirements and a 250-runner field. Its race headquarters and results history are specific to this distance.

Course

The 100-kilometre route crosses Cuyamaca Rancho and a portion of Anza-Borrego State Park. Varied ecosystems, trail surfaces and sustained climbing make pacing complex.

Race-day weather

Early October may bring dry heat, strong sun, cold nighttime air or mountain wind. The course's elevation and desert edge create sharper variation than coastal San Diego.

Past Cuyamaca 100K dates and results

YearDateStatusResults
2026Saturday, October 3, 2026Results availableOpen results
2025—Results availableOpen results

Cuyamaca 100K FAQ

When is the Cuyamaca 100K?

We're waiting for the finalized date for the 2027 Cuyamaca 100K. The most recent running was on Saturday, October 3, 2026.

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Send us confirmed dates, registration links, results, live tracking, or course changes. Include the source link so runners can reach the right information.

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