San Diego 100
Lake Cuyamaca, CA
San Diego 100 is a trail race of 100 miles (161 km) in Lake Cuyamaca, California. The next edition is on Friday, April 30, 2027. The race gives its climbing as 15,600 ft (4,755 m); measured from its course file, it's 18,438 ft (5,620 m). It starts at 4,643 ft (1,415 m) above sea level. Its high point is 6,474 ft (1,973 m). The course finishes where it starts. It's a Western States 100 qualifier. Entry is by lottery.
There are 16 other upcoming 100-mile races in California. San Diego 100 climbs about 156 ft a mile (30 m per km), flatter than 60% of the 142 100-mile races listed with their climbing.
The course
Questions about San Diego 100
When is San Diego 100 2027?
San Diego 100 2027 is on Friday, April 30, 2027.
Where is San Diego 100?
San Diego 100 is held in Lake Cuyamaca, California.
How long is San Diego 100?
San Diego 100 is 100 miles (161 km).
How much elevation gain does San Diego 100 have?
San Diego 100 has 15,600 ft (4,755 m) of elevation gain, as the race states it.
Is San Diego 100 a Western States qualifier?
Yes. San Diego 100 is on the Western States 100's list of qualifying races. Check wser.org for the qualifying standard and years.
How do you get into San Diego 100?
Entry to San Diego 100 is by lottery.
What is the weather usually like at San Diego 100?
Around San Diego 100's date, the day's high is typically about 64°F (18°C) and the low about 42°F (6°C), averaged over recent years.
Where can I see the San Diego 100 elevation profile and aid station cutoffs?
runfarwhere has San Diego 100's course file. The outline, distance and climbing are free on its page; the elevation profile, aid stations with cutoffs and the GPX file are part of runfarwhere Premium.
How hilly is San Diego 100?
San Diego 100 climbs about 156 ft a mile (30 m per km), flatter than 60% of the 142 100-mile races listed with their climbing.
What other 100-mile races are there in California?
Other upcoming 100-mile races in California include Cahuilla Rez Ultra (November 14, 2026), Boundiful Endurance Runs (November 28, 2026) and Will Rogers 24 Hour/12 Hours/6 Hour (February 27, 2027).
Other races in California
- Leona Divide 100 Miler · Apr 17, 2027
- Silver Moon Race 100 Miler · Apr 17, 2027
- Canyons by UTMB 100 Mile · Apr 23, 2027
- Coyote Two Moon 100 Mile · Apr 30, 2027
- Born to Run Ultra Marathons 100 Mile · May 12, 2027
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