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Big Bear Grizzly 100

September 13 2025
Big Bear Lake CA
Date Confirmed
 
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Distances: 30, 50 75, 100 km
Difficulty: Moderate terrain with rolling short steep hills or moderate, sustained climbs

The Grizzly 100/75 has become an international attraction for mountain bikers from all over the world.  With some of the most challenging single-track, double-track, and fire road climbs and descents, participants love to challenge themselves and others on this high altitude course (at 7000-8500 feet elevation).  The Clarks Grade Climb has made a name for itself as one of the most dreaded 5 mile climbs in Southern California.  The Grizzly 100k NUE Century Challenge and the 70-75k NUE Marathon Challenge welcome racers and riders to Big Bear Lake, CA.  The Big Bear MTB Gran Fondo with sport rides of 30/50k rounds out the day’s events.  Astonishing aid stations, friendly volunteers, and lots of local enthusiasm for this event make it a great finish to the NUE Series.

Big Bear Grizzly 100

 
Start Located At: Big Bear Lake, CA
 
Leaflet | granfondoguide
 
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