Do I Need Chains on SR-18?
Highway 18 Rim of the World Drive — 6,750 ft
SR-18 over Rim of the World is currently clear. No chain controls are in effect.
View Live Route Conditions on MapCommon Chain Control Checkpoints
Frequently Asked Questions
Do I need chains to drive to Big Bear on Highway 18?
During winter storms, Caltrans implements chain controls on SR-18. During R1, AWD/4WD vehicles with snow tires can proceed without chains. During R2, only AWD/4WD with snow tires on all four wheels is exempt. During R3, ALL vehicles need chains -- no exceptions.
How many chains do I need for Highway 18?
You need at least 2 chains, installed on your drive wheels. Front-wheel-drive: chains on front tires. Rear-wheel-drive: chains on rear. AWD: chains recommended on front axle when required.
Can I use snow socks instead of chains on SR-18?
Yes, AutoSock and similar Caltrans-approved alternative traction devices work for R1 and R2 controls. During R3 controls, only traditional metal chains are accepted.
Where do I put on chains on Highway 18?
Chain control checkpoints are typically set up near Crestline, Lake Arrowhead, and Running Springs. Install chains before reaching the checkpoint -- chain-up areas can be limited on narrow mountain sections.
Is Highway 18 or 330 better to Big Bear in snow?
SR-330 from Highland is the more direct route and typically gets cleared first. SR-18 from Crestline is more scenic but windier. During storms, check both routes -- one may be open while the other is closed.
What is R1, R2, R3 chain control?
R1 means chains required except for vehicles with snow tires or AWD/4WD. R2 means chains required except AWD/4WD with snow tires on all four wheels. R3 means chains required on ALL vehicles including AWD/4WD. R3 usually precedes highway closure.