Covering the 106,372-acre park, as well as thousands of acres of surrounding land in the Lassen National Forest, Caribou, Thousand Lakes, and Ishi wilderness areas, and Hat Creek Valley—this map has been completely updated for even more comprehensive coverage and easier use. It features more than 450 miles of trails, as well as trailheads, points of interest, campgrounds, picnic areas, ranger stations, access roads, scenic turnouts, and parking areas. Trail elevations, junction mileages, latitude-longitude notations, and UTM grid-lines are all shown.

4th edition