Washington State requires chains on mountain passes in winter, with fines up to $500 for violations.

In Washington State, "Chains Required" means most vehicles must use chains on mountain passes during winter storms, with exceptions for four- and all-wheel drive vehicles that carry chains and can install them. Passenger vehicles need approved traction tires when alerts are issued, while larger vehicles over 10,000 pounds must always use chains. Studded tires don’t count. In extreme conditions, even AWD and 4WD vehicles must chain up. Violations can lead to a $500 fine and increased danger. Drivers should prepare in advance to avoid delays and keep roads open.