Southern California Regional Rocks and Roads - Virtual Tour of the Ridge Route
File:Ridge Route ca 1920 4.jpg - Wikimedia Commons
THE FORGOTTEN HIGHWAY: RIDING CALIFORNIA'S RIDGE ROUTE – Road Bike Action
Southern California Regional Rocks and Roads - Views From The Ridge Route
Why a historic highway that united California's two halves may never reopen to cars - Los Angeles Times
Lost Hotels on California's Historic Ridge Route by Harrison Irving Scott
Southern California Regional Rocks and Roads - Virtual Tour of the Ridge Route
US 99: The Ridge Route
The Ridge Route (Tejon - Castaic Ridge Rd.) between Los Angeles & Bakersfield California (1920's Souvenir Postcard Folder): Buster Keaton, Mary Chesrown: Amazon.com: Books
Highway History: California's Ridge Route – Moving History
SCVHistory.com | Ridge Route | Part 1: The Route Over the Ridge, by Dr. Alan Pollack
Ridge Route - Wikipedia
Ridge Route Preservation Organization – Working to protect and preserve the Scenic and Historic 1915 Ridge Route
Why a historic highway that united California's two halves may never reopen to cars - Los Angeles Times
Ridge Route at Templin Hwy | California history, National register of historic places, San luis obispo county
US 99: The Ridge Route
The Ridge Route - YouTube
The Old Ridge Route - Gorman, CA - U.S. Route 99 - The Pacific Highway on Waymarking.com
Old Ridge Route and Interstate 5 through Grapevine Canyon
California's Historic Ridge Route
Ridge Route - Home
Old Ridge Route Road in Angeles National Forest
California History: The Ridge Route – Ricochet
