Chico Outdoor Adventurer Biking State & Regional Parks

Guardian and Annie Bidwell Trail Loop

With the loop being either all uphill or all down­hill, the Guardian and Annie Bid­well Trail (for­mer­ly known as the South Rim) is rec­om­mend­ed for advanced rid­ers in great shape.

Guardian Trail is an extreme­ly exposed sin­gle-track, fea­tur­ing cliff edges in some areas and amaz­ing views of the gorge. 

Annie Bid­well Trail (South Rim) Trail is extreme­ly rocky and very tech­ni­cal, with sev­er­al drop-offs of more than 4 feet along a washout. Start down a steep fire road at 10 Mile House Trail, take the left turnoff to ride down Guardian Trail. 

When Guardian Trail ends at South Rim Trail, bear right (north) for a steep descent to the Annie Bid­well Trail. Keep right for the Ten Mile House Road and back to where you began. 

Key Info

Trail Dif­fi­cul­ty: Serious/​Technical

Trail Length & Type: 8.6 mile loop, Mountain

Best Used: Acces­si­ble year-round but closed dur­ing wet weather

Trail Map: MTB Project


From Chico head east on Hwy 32. Turn left on the turnout across from the 10 Mile House Road. Start at the green gate. If you have passed Altati­na Dri­ve you have gone too far.