Mountain Biking

The Grizzly 100 & Big Bear Mountain Biking Gran Fondo comprise a single-day mountain biking event in the San Bernardino Mountains at Big Bear Lake.

The annual Filthy 50+ mountain bike race takes riders through various areas of San Dieguito River Park and Black Mountain Park.

E-Dirty Cross, is a Southern California electric mountain bike race series in San Diego County.

Dirty Thirty is a 30 mile mountain bike race in Lakeside, California, hosted by Quick-n-Dirty.