The Northern California Segment of the Pacific Crest Trail runs from the Oregon border to Lake Tahoe. The trail passes through Siskiyou County, Trinity County, Shasta County, Plumas County, Tehama County, Butte County, Sierra County, Nevada County, Placer County, & El Dorado County.

• PCT Wiki. The well trodden guide to the Pacific Crest Trail.
• Pacific Crest Trail Association.
• Pacific Crest National Scenic Trail.
• Northern California Segment of the Pacific Crest Trail.