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Grizzly 100 & MTB Gran Fondo

The Grizzly 100 & Gran Fondo is slated for Oct 5, 2024! Register today!

October 5, 2024

The Grizzly 100/75K is a National Ultra Endurance Race course offering epic technical riding on some of Southern California’s best single track right in the heart of the San Bernardino mountains. This race draws some of the top mountain bikers from around the world.

The Big Bear Gran Fondo is a Mountain Bike ride offering four different routes to fit all levels of riders. With the 30k Skyview or the 50k Skyline course, you’ll enjoy the best riding that Big Bear has to offer.

Registration Open!

Grizzly Courses

Grizzly 75K - The 75K begins along Pine Knot Avenue to Knickerbocker Road, then up the 2N08 fire road. Climb to Pine Knot Trail (1E01), across 2N10, then descend Seven Oaks Trail. You'll ride down to Southfork and start on the Santa Ana River Trail (SART) and continue to Middle Control Road. Once you hit Radford Road, you'll climb this steep, exposed route with beautiful views. At the top, you'll ride Skyline Trail back to Pineknot Trail (1E01) and Knickerbocker Road to return to the Start/Finish.

Grizzly 100K -
The Grizzly National Ultra Endurance course offers technical riding on some of Southern California’s best single track in the heart of the San Bernardino mountains. This race draws top mountain bikers from around the world with 100 kilometers of riding and 10,000 vertical feet of climb – are you tough enough?

Courses & Info

Gran Fondo Courses

Gran Fondo 30K - Starting in the Village at Big Bear Lake, riders pedal along Pine Knot Avenue then up Knickerbocker Road following to the 2N08 fire road. The pedal continues to Pine Knot Trail (1E01), then on to 2N10 (great photo op of San Gorgonio from Grand View Point!) From there, riders pedal along 2N10 Eastbound on the ridgeline until the beginning of Skyline Trail. Riders will travel along Skyline until the turn around point, then reverse and finish in The Village once again.

Gran Fondo 50K -
The 50K route is a complete tour of Big Bear's Skyline Trail but without the dreaded Radford Road climb. Riders start up Pine Knot Avenue to Knickerbocker Road on the way to the 2N08 fire road. The climb continues to Pine Knot Trail (1E01) and the 2N10 fire road where riders follow signs to Skyline Trail with the best views in the Valley. At the turn around, riders will reverse course to the finish.

Courses & Info

Event Schedule

  • October 4 - Check in 3 - 7 PM at Start/Finish in The Village
  • October 5 - Check in 6 - 8 AM at Start/Finish in The Village
  • October 5 - Grizzly 100K start at 7 AM, 75K start at 7:05 AM
  • October 5 - Gran Fondo 50K start at 7:45 AM, 30K start at 8:15 AM