The Trinity Alps mountain range in the northwest corner of California form a rugged and little-explored divide, tucked between the Coast Ranges and the Cascades. The half-million acres of wilderness contain high waterfalls, glaciated granite peaks, sparkling lakes, and cool, deep forests. They also have another increasingly scarce attribute: relatively few visitors. The fifth edition of this classic hiking guide, in print for more than 25 years, has been completely revamped and now covers not only trails and cross-country routes in the Alps but in nearby recreation lands. It contains descriptions of 48 of the best day hikes and backpack trips, and has all-new maps and elevation profiles for each hike.