This guide covers the range from San Francisco & Santa Cruz mountains to Lake Tahoe in the East all the way up to the Klammath Mountain region bordering Oregon. I have used this guide in connection with other guides that cover more specific areas (such as Marble Mountains, Trinity Alps, etc.). This is also one of the more helpful guides covering Mt. Lassen National Park back-country trails & campsites.
This third edition brings the Soares' brothers classic guide to the 100 best of Northern California's hikes thoroughly up to date and adds elevation profiles for most of the 100 hikes. New color photos have been added and all facts, trail, and map details have been reviewed by rangers and trail supervisors. Appendices now include web contact information. A handy trails-at-a-glance chart indicates distance, level of difficulty, and seasonal considerations.
I'm about to head off on hike number 46: "Patterson Lake and Squaw Peak" in little-visited Modoc National Forest.
I'm a little annoyed they don't include latitude-longitude references, so I have to trace their directions on a topo map to even figure out where the trailhead is.
But it seems well written, and otherwise appears to have all the technical data I'd want.