Extreme winter conditions on the Interstate 5 Siskiyou Pass often require a conditional road closure – a requirement for all vehicles to use chains regardless of the type of vehicle or type of tire. ODOT and Oregon State Police maintain check points and will turn a motorist around if they aren’t prepared.
Siskiyou Pass Restrictions
1. Carry Chains
Chains must be in or on your vehicle and must be the right size and of sufficient number to comply with chain laws.
2. Single Axle Trucks and Vehicles Pulling Trailers
All single axle trucks over 10,000 GVW (gross vehicle weight), trucks pulling double trailers, and any vehicle pulling a trailer is required to install chains. Traction tires cannot be substituted for chains.
3. All Trucks and Vehicles Pulling Trailers
All trucks over 10,000 GVW as well as any vehicle pulling a trailer needs to chain up. Traction tires cannot be substituted for chains.
4. Full Chain Restriction
This is Oregon’s most severe winter restriction. All vehicles, with the exception of vehicles with 4-wheel drive and emergency response vehicles, are required to install chains. A traction tire is not allowed to substitute for chains.