National Trails System Pacific Crest National Scenic Trail Pacific Crest National Scenic Trail extends 2,600 miles from Canada to Mexico, passing through some of the most scenic areas in California. The Sierra Nevada section provides a tour of wilderness areas. In the Ansel Adams Wilderness, the trail passes Devils Postpile National Monument (N37º38’ W119º5’), … More Sierra Nevada Forests, Part 3D: Trails and Wilderness Areas of the Yosemite Vicinity