The Big Alta
Marinwood, CA
The Big Alta is a trail race of 62 miles (100 km) in Marinwood, California. The next edition is on Friday, March 19, 2027. The race gives its climbing as 12,749 ft (3,886 m); measured from its course file, it's 14,249 ft (4,343 m). It starts at 14 ft (4 m) above sea level. Its high point is 2,382 ft (726 m). The course runs point to point. It's a Western States 100 qualifier.
There are 42 other upcoming 50-mile and 100K races in California. The Big Alta climbs about 205 ft a mile (39 m per km), flatter than 60% of the 119 50-mile and 100K races listed with their climbing.
The course
Questions about The Big Alta
When is The Big Alta 2027?
The Big Alta 2027 is on Friday, March 19, 2027.
Where is The Big Alta?
The Big Alta is held in Marinwood, California.
How long is The Big Alta?
The Big Alta is 62 miles (100 km).
How much elevation gain does The Big Alta have?
The Big Alta has 12,749 ft (3,886 m) of elevation gain, as the race states it.
Is The Big Alta a Western States qualifier?
Yes. The Big Alta is on the Western States 100's list of qualifying races. Check wser.org for the qualifying standard and years.
What is the weather usually like at The Big Alta?
Around The Big Alta's date, the day's high is typically about 61°F (16°C) and the low about 44°F (7°C), averaged over recent years.
Where can I see the The Big Alta elevation profile and aid station cutoffs?
runfarwhere has The Big Alta'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 The Big Alta?
The Big Alta climbs about 205 ft a mile (39 m per km), flatter than 60% of the 119 50-mile and 100K races listed with their climbing.
What other 50-mile and 100K races are there in California?
Other upcoming 50-mile and 100K races in California include Anza Borrego Cuyamaca 50 Mile Run (December 5, 2026), Ray Miller 50/50 (December 5, 2026) and Hunter S. Thompson Fear & Loathing (December 6, 2026).
Other races in California
- SoCalUltraTrail at Tejon Ranch 100K · Feb 27, 2027
- Sycamore Canyon 100K · Mar 6, 2027
- Marin Ultra Challenge 50 Miler · Mar 13, 2027
- Yubaneer 50 Mile · Apr 1, 2027
- Santa Barbara Tough Enough 59 Mile · Apr 3, 2027
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