Cuyamaca 100K Endurance Run 2025 returns on October 4 for a tough and scenic ultra in Cuyamaca Rancho State Park, about 40 miles east of San Diego. The 100K course is broken into three loops: a 31.5-mile loop to Cuyamaca Peak (6,512 ft), a 12.6-mile southeastern loop toward Oakzanita Peak, and a final 18.3-mile stretch including the Pacific Crest Trail and a portion of Anza-Borrego Desert. The total elevation gain is approximately 8,800 feet (2,682 m), with varied terrain through forest, meadow, chaparral, and exposed ridgelines. Runners must meet qualification criteria (completion of a trail 50K or longer in 2024 or 2025) and start at 6:30 AM, with a 19-hour cutoff to complete the course. Finishers receive a technical tee, hoodie, finisher’s medal, and hand-crafted awards for top performers, with strong course support and sustainability-focused race practices throughout the day.
Race
100 km
Race Date:
04 October, 2025
The Cuyamaca 100K Endurance Run traverses 62.1 miles (100 km) across Cuyamaca Rancho State Park, featuring three distinct loops starting and ending at Camp Cuyamaca off Highway 79, including a summit on Cuyamaca Peak (6,500 ft) and a Pacific Crest Trail section with expansive desert panoramas. Organized by San Diego Ultra Running Friends, the race will take place on Saturday, 4 October 2025, at Camp Cuyamaca in Cuyamaca Rancho State Park, Julian, San Diego County, California.
Weather based on historical averages.
FAQs
What is the Cuyamaca 100k?
How long is the Cuyamaca 100k?
Where does the Cuyamaca 100k take place?
What is the elevation gain of the Cuyamaca 100k?
How can I prepare for the Cuyamaca 100k?
How do I choose the right training plan for the Cuyamaca 100k?
The Cuyamaca 100K Endurance Run traverses 62.1 miles (100 km) across Cuyamaca Rancho State Park, featuring three distinct loops starting and ending at Camp Cuyamaca off Highway 79, including a summit on Cuyamaca Peak (6,500 ft) and a Pacific Crest Trail section with expansive desert panoramas. Organized by San Diego Ultra Running Friends, the race will take place on Saturday, 4 October 2025, at Camp Cuyamaca in Cuyamaca Rancho State Park, Julian, San Diego County, California.
The Cuyamaca 100k is 100km long.
The Cuyamaca 100k takes place in Cuyamaca, Julian, CA.
The Cuyamaca 100k elevation gain is 2715 metres, which Runna classifies as a Hilly race.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Cuyamaca 100k?
The Cuyamaca 100K Endurance Run traverses 62.1 miles (100 km) across Cuyamaca Rancho State Park, featuring three distinct loops starting and ending at Camp Cuyamaca off Highway 79, including a summit on Cuyamaca Peak (6,500 ft) and a Pacific Crest Trail section with expansive desert panoramas. Organized by San Diego Ultra Running Friends, the race will take place on Saturday, 4 October 2025, at Camp Cuyamaca in Cuyamaca Rancho State Park, Julian, San Diego County, California.
How long is the Cuyamaca 100k?
The Cuyamaca 100k is 100km long.
Where does the Cuyamaca 100k take place?
The Cuyamaca 100k takes place in Cuyamaca, Julian, CA.
What is the elevation gain of the Cuyamaca 100k?
The Cuyamaca 100k elevation gain is 2715 metres, which Runna classifies as a Hilly race.
How can I prepare for the Cuyamaca 100k?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Cuyamaca 100k?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
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Sport:
Running
Tags:
Nature
Altitude
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Cuyamaca 100k 2025 or San Diego Ultra Running Friends. All event details are based on publicly available information and are provided solely to help users discover running events. Runna does not use any official logos, images, or proprietary content from this event or its organiser. Any trademarks or names mentioned are used descriptively to identify the event in a factual manner. For the most accurate and up to date information (including to register or purchase an entry to the event), please visit the Cuyamaca 100k 2025 website.
