Mammoth Winter Recreation Trails Grooming Report

Mammoth Winter Recreation Trail Grooming Update:

Updated : Sat, Mar 17, 2018 2:55 PM

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Special Trail Conditions
many wet spots on the trail be carfull
To see live tracking when the snowcat is grooming click here.

For the current avalanche forecast:

Happy Winter Recreating!

Please ride on the far right side of the trails at all times.
The life you save may just be yours.
Plan ahead and be safe!

Inyo National Forest Snowmobile Winter Recreation Trails Map

The Eastern Sierra Interpretive Association (E.S.I.A.) is a non-profit organization responsible for assisting the Inyo National Forest in providing interpretive activities and information to our visitors.

E.S.I.A. has set up the Mammoth Winter Recreation Trail Grooming Fund to assist the U.S. Forest Service in providing trail signs, trail maps, grooming reports and improved grooming of the Inyo's winter trail system.

If you would like to donate to this fund, please send your generous contribution, in the form of a check or money order, to:

Mammoth Winter Recreation Trail Grooming Fund
Eastern Sierra Interpretive Association
190 E. Yaney St.
Bishop, California 93514
(760) 873-2411


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