Free. You can start with nothing.
A single 100k distance run as three loops of different lengths, all starting and finishing at Camp Cuyamaca: Loop 1 (31.8 mi per the official aid-station chart) west side of the park, summiting Cuyamaca Peak at 6,512 ft; Loop 2 (12.8 mi) southeast corner near Oakzanita Peak; Loop 3 (18.2 mi) north through the park past Lake Cuyamaca and Stonewall Peak, briefly into Anza-Borrego Desert State Park along the Pacific Crest Trail, back to the finish. Total elevation gain/loss 8,800 ft each way per the race's own course-description page. Course distance does not reconcile across the race's own pages --(62.0 to 63.2 mi).8 mi as canonical because that chart is the operational document with per-station mileage and cutoffs.
Loop distances differ across the race's own pages and do not sum consistently: aid-station chart 31.8 + 12.8 + 18.2 = 62.8 mi; course-description/route pages 32.3 + 12.6 + 18.3 = 63.2 mi; detailedinfo PDF (rounded) 31 + 13 + 18 = 62 mi; UltraSignup listing 31.5 + 12.6 + 18.3 = 62.4 mi. Loop 1 climbs to the course's high point, Cuyamaca Peak (6,512 ft); Loop 3 is the only loop that leaves Cuyamaca Rancho State Park, briefly crossing into Anza-Borrego Desert State Park along the PCT.
A 100-kilometer trail run in Cuyamaca Rancho State Park, about an hour east of San Diego, run as three loops of different lengths from Camp Cuyamaca: the first and longest loop summits the park's high point, Cuyamaca Peak (6,512 ft); the second loop takes in the southeast corner of the park near Oakzanita Peak; the third loop passes Lake Cuyamaca and Stonewall Peak and briefly enters Anza-Borrego Desert State Park along the Pacific Crest Trail before returning to the finish.
Held since 2012 (the 2012 edition is described by a runner report as the 'Inaugural Cuyamaca 100K'). The 2026 edition is a Western States 100 qualifier for the 2027 lottery.
| Mile | Station | Cutoff | Crew access | Bag | Pacer | Med | To next |
|---|---|---|---|---|---|---|---|
| 0.00 |
Camp Cuyamaca Start
4,080 ft
|
? | ● | ● | ? | ? | 8.40 |
| 8.40 |
Merrigan Aid Station
3,400 ft
|
? | ○ | ○ | ? | ? | 5.80 |
| 14.20 |
Green Valley
3,980 ft
|
11:00am | ● | ○ | ? | ? | 9.00 |
| 23.20 |
Cuyamaca Peak
6,512 ft
|
2:30pm | ○ | ○ | ? | ? | 5.00 |
| 28.20 |
Paso Picacho
4,890 ft
|
3:00pm | ● | ○ | ? | ? | 3.60 |
| 31.80 |
Camp Cuyamaca (end Loop 1 / start Loop 2)
4,080 ft
|
4:30pm | ● | ● | ○ | ? | 8.00 |
| 39.80 |
East Mesa Trailhead
3,920 ft
|
7:00pm | ○ | ○ | ? | ? | 4.80 |
| 44.60 |
Camp Cuyamaca (end Loop 2 / start Loop 3)
4,080 ft
|
8:00pm | ● | ● | ● | ? | 6.80 |
| 51.40 |
Sunrise
5,058 ft
|
10:00pm | ● | ○ | ? | ? | 4.60 |
| 56.00 |
Pedro Fages
4,680 ft
|
11:30pm | ● | ○ | ? | ? | 6.80 |
| 62.80 |
Camp Cuyamaca Finish
4,080 ft
|
1:30am | ● | ● | ? | ? | ? |
11842 CA-79, Descanso, CA 91916. Crews must park in marked stalls near the falls area or the Arroyo Seco picnic area and walk 1/4 to 1/2 mile to the aid station; no crews or spectators may park in the Falls parking area itself. Day-use parking fee $10.
cuyamaca100k.comFollow the direction of parking marshals; overflow parking along the loop road north of the picnic area. Day-use parking fee $10.
cuyamaca100k.com14833-15155 County Rte S1, Julian, CA 92036. No day-use parking permit required at this location.
cuyamaca100k.com15608 Sunrise Hwy, Julian, CA 92036. No day-use parking permit required at this location.
cuyamaca100k.comNobody has been out there with a camera or a microphone yet. A gap means nobody has found it, not that it is not out there. Seen a course preview or a film of this one? Send us the link.
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We read every one of these and we write back. Every fact here carries the source it came from, and the way a wrong one gets fixed is a person checking it against what you tell us.
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I keep this catalog because the information is scattered and hard to trust. Telling you when it moves is the same job.
