Grizzly 100 & MTB Gran Fondo
Stay tuned for 2024 event info
The Grizzly 100/75K vs the Big Bear Gran Fondo
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.
Grizzly Courses
Grizzly 75K - The 75K begins along Pine Knot Avenue to Knickerbocker Road, then up the 2N08 fire road. The climb leads to Pine Knot Trail (1E01) and across 2N10, then descends the Seven Oaks Trail. This is a challenging trail with loose terrain, twists, turns, and steep drop offs. You'll ride down to Southfork and start on the Santa Ana River Trail (SART) and continue until Middle Control Road. Once you hit Radford Road, you'll climb this steep, exposed and very hot route with beautiful views of Seven Oaks and San Gorgonio. At the top, you will ride the famous Skyline Trail back to Pineknot Trail (1E01) and descend to 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?


Gran Fondo Courses
Gran Fondo 30K - Starting in the Village at Big Bear Lake, riders will pedal along Pine Knot Avenue then up Knickerbocker Road following signs 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 - see the historic Knickerbocker Mansion - 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.