Course 100k Big Alta 2026

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Course characteristics
Difficulty scale
RMT
6
Mountain value
G
4
Class group
Ultra
Mountain value group
G
Regular
Distance
⨦ 98 km
Flat equivalent
Uphill
+ 4 150 m
Downhill
- 4 150 m
Location
United States
Time predictions

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Surface
Trail score
Predominant
Elevation profile
Highest point
728 m a.s.l.
Lowest point
3 m a.s.l.
Elevation range
725 m
Peaks on the course
7
Engagement Hill ~ 238 m a.s.l.
⨦ 3.5 km
Cardiac Hill ~ 413 m a.s.l.
⨦ 31 km
Bare Knoll ~ 478 m a.s.l.
⨦ 39.5 km
Mount Tamalpais West Point ~ 527 m a.s.l.
⨦ 45.5 km
Mount Tamalpais East Peak ~ 784 m a.s.l.
⨦ 48.5 km
Loma Alta ~ 484 m a.s.l.
⨦ 80.5 km
Big Rock Ridge ~ 575 m a.s.l.
⨦ 89.5 km
Terrain
Average terrain slope
24 °
Terrain unevenness
Distance on difficult terrain
Uphills and downhills
Average uphill gradient
12 %
Average downhill gradient
-12 %
Key climbs
Key descents
Weather
Weather on that day
Course information
Elevation data
Copernicus DEM 30 m
Number of events with this course
1
Event date
20 Mar 2026
Results published
2 Oct 2026
Valuation status

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