USFS Winter Recreation Trail Maps
Click the maps below to view larger versions

North Map

South Map


USFS Snowmobile Trail Grooming Report

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 Snowmobile 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 Snowmobile Trail Grooming Fund
190 E. Yaney St.
Bishop, California 93514