As US 99 celebrates is 100th anniversary, we put together a video discussing what US 99 was, its history, and what happened to it. Learn about the whole US 99 “family” of routes, when it was decommissioned, and what replaced it in California. Come check it out!
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New Video – Ridge Route Basics
The Historic Highway 99 Association of California, in conjunction with the RRPO, has produced a video on the basics of the Ridge Route and some of the features that make the road unique. Learn about the curbs, rails, footprints of all types, tire tracks, and more that can be found on the road. You can also learn about the different pavement types on the road as well as how you can get up there and see the road yourself.
Highway 99 Discord Channel
Greetings all!
We’re starting a Discord server to help broaden our reach and increase discussion about Historic US 99 in California. Come join us on Discord on our server!
99 Update Region 4- Santa Clarita, CA
From Evan Decker of Mentryville, Inc:
If you’ve recently driven along the 5 Freeway (Interstate 5) near the Lyons Avenue/Pico Canyon Road exit recently, you’ll notice some new California Historical Landmark wayfinding signs for the historic oil boomtown of Mentryville which was established in 1876. It is so important that historic sites such as Mentryville deserve the proper recognition they deserve. A huge Thank You to the California State Office of Historic Preservation as well as CalTrans for making these signs a reality.

December 2022 Meeting
On Tuesday, December 13 at 6 pm, we will be holding a Zoom meeting to discuss the Association. We’d love to hear your thoughts on what we’ve done, what we can do, and how you can help! To sign up for our meeting, use the link below.
https://us06web.zoom.us/meeting/register/tZwpdO6prTsuHNAS4eoE5AY215Uzohav93Kj