About MountainSwitch
Mountain road conditions, without the clutter.
If you're driving up to Big Bear, Mammoth, or one of our other California destinations, MountainSwitch shows the current status of the routes in, all on one page. The data is from Caltrans. We clean it up so you can read it before you leave, instead of clicking through Caltrans' site at 5am.
What we do today
Right now MountainSwitch covers these California destinations:
Big Bear · Lake Arrowhead Rim · Idyllwild · Mammoth Lakes · June Lake and Mono Basin · Oakhurst and Bass Lake · Shaver Lake · Kern River Valley
Open any one of them and you'll see the main routes in and whether each is open, under chain control, or closed. The data comes from Caltrans CWWP2, the same feed their own site uses, refreshed on a regular cycle. If an upstream feed is down or returning errors, we say so on the page instead of pretending nothing's wrong.
What we don't do
MountainSwitch is informational, not authoritative. A road sign beats us. So does a traffic officer waving you off. So does the weather you can see through the windshield. If a Caltrans feed is slow, stale, or wrong, our page will be too. Verify conditions before you drive, and follow whatever you're told on the ground.
Where we're going
California first, because California has the messiest feeds and the roads we actually drive. Washington, Oregon, Colorado, Utah, Nevada, and British Columbia are the obvious next stops. If there's a range you want covered, tell us.
Why we built it
Mountains are the hardest roads to drive in California. Snow, chain controls, closures that can cut you off for days. We wanted one place where you could look up a destination, like Big Bear or Mammoth, and see the conditions on the roads in without hunting through each highway or squinting at a map. So we made one.
Built on the Rim of the World Scenic Byway in Big Bear, California. Maintained under Ezlogy Inc., a California corporation.
Data Source Attribution
MountainSwitch republishes the active California route catalog from official Caltrans feeds.
- Caltrans (US-CA): Chain control and road condition data from the California Department of Transportation.
Reach us
If something looks wrong on the site, or there's a route you want us to cover, or you need higher API limits for a commercial use, email support@mountainswitch.co .