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Mammoth Bar OHV Area

Mammoth Bar Motocross Track and Trails Update (January 2018)

The Mammoth Bar Off-Highway Vehicle (OHV) area within Auburn State Recreation Area continues to be closed to OHV use. Heavy rains and flooding shut down the area one year ago in early January 2017. Since then, State Parks along with partner agencies and stakeholder groups have been developing a range of options for the future of the Motocross Track (MX Track) and a plan to reopen the trail system.

Last February, approximately 15 percent of the Motocross Track was washed away by high flows from the Middle Fork of the American River. When the high waters receded, State Parks conducted an initial conditions analysis of the trails, worked with FEMA and Cal OES representatives, and received assistance from the Off-Highway Motor Vehicle Recreation (OHMVR) Division. Partnering with a specialist from the California Geological Survey, a drone survey was conducted in order to topographically map the area. This data was used to provide a range of options for rebuilding the MX Track.

Auburn State Recreation Area Sector Superintendent Mike Howard recently convened the Mammoth Bar Task Force to discuss the future of the MX Track and surrounding area. The Task Force includes representatives from the American Motorcycle Association (AMA), the Sierra Club, the Mammoth Bar Riders Association, Friends of the River, the OHMVR Division, and the US Bureau of Reclamation. The Task Force is analyzing future actions related to the 2017 flood events, which include mitigating public safety hazards created by the flood and four options for rebuilding the MX track. These options range from taking no action to four alternatives for rebuilding the MX Track.

State Parks is concurrently working with the OHMVR Division on a project to reopen the following trails: River Bar, Stonewall, Rocky, Ranch, Hillside, Squaw Flat, Castle Rock and the 90cc Kids Track. To better facilitate movement throughout the area, the Squaw Flat Trail will be changed from a one way trail to a two way trail.

This page will be updated as changes are made.

Rider ImagePLEASE NOTE:   Mammoth Bar motorcross track reopened in August of 2007 after a lengthy process to complete all the environmental paperwork necessary to rebuild the track.

Mammoth Bar OHV Area is part of the Auburn State Recreation Area. It is located in the Sierra Nevada foothills about thirty miles northeast of Sacramento. This motorcycle/ATV riding area has been used by off road enthusiasts for nearly 25-years and offers a wide range of trails and conditions in a beautiful setting next to the Middle Fork of the American River. The area is under the jurisdiction of the Bureau of Reclamation and is operated by California State Parks. Some OHV motorcycle/ATV trails are open for two-way traffic and others are one way only. OHV's are restricted to designated signed trails, to the MX tracks and the PIT (Pacific International Trials) areas.

*Mammoth Bar is open 7 days a week,  OHV use is permitted only on specific days. OHV Ride Days are as follows;

April 1st-September 30th  Sunday, Monday, and Thursday
October 1st-March 31st Sunday, Monday, Thursday, and Friday


The entrance to Mammoth Bar is located on Old Foresthill Road.  The easiest access is off of Interstate 80 north of Auburn. Take the Foresthill exit off I-80 and go east about 2.5 miles to the Old Foresthill Road.  Turn right on Old Foresthill and the entrance is about 1.5 miles on the left.

All OHV use is regulated by both Federal and State laws. OHV's must have a visible ("Green Sticker" OHV registration) Red stickers are allowed all year round.

All OHV's must have a US Forest Service approved spark arrester in working condition and meet Federal and State noise standards (96 decibels maximum).

It is the rider's responsibility to know and comply with all applicable rules and regulations.

Facilities include picnic tables, BBQ's, Chemical toilets. No drinking water.

Mammoth Bar trail maps are available at the park office and kiosk.