Frost or Fog 10-Mile
Always double-check with the organizer's website! This page may contain affiliate links.
Event information
The Frost or Fog 10-Mile, Quarter Marathon and 5K takes place on Saturday, January 24, 2026 in Chico, California. The event meeting place is listed as 357 Centennial Dr, Chico, CA 95928. The race courses are in Upper Bidwell Park and cover gravel, trail and road surfaces. Any registrants after 12/30/2025 are not guaranteed a hooded shirt giveaway.
- 10 Mile
- Quarter Marathon (1/4 Marathon)
- 5K
Course details
All three courses begin on the levee between 5 Mile Recreation Area and Hooker Oak Park. After the levee, participants turn right at the bridge and follow a trail that runs parallel to Wild Wood and Upper Park Roads. Runners cross at 5 Mile Way and continue onto the bike path before using Upper Park Road for portions of the route.
The 10 Mile course continues on Upper Park Road to about 5.5 miles, with the turnaround where B Trail meets Upper Park Road, then returns to the bike path and finishes after crossing the bridge over the creek. The Quarter Marathon runs slightly farther on Upper Park Road to just past the Bear Hole parking lot before returning. The 5K turns left from the bike path into the Rod & Gun Club parking lot, passes through the lot, then returns to the bike path and finishes after crossing the bridge over the creek. Visit the organization's website for the most recent information.