Washington Studded Tires Laws (2026)

Conditional: Studded tires are legal in Washington only from November 1 through March 31, and extensions are possible.

ConditionalVerified Jun 20, 2026

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Studded tires are legal in Washington only from November 1 through March 31, and extensions are possible. They're prohibited the rest of the year. See Wash. Rev. Code 46.37.420 and the Washington State Department of Transportation (WSDOT).

Official source: app.leg.wa.gov →

General legal information, not legal advice — verify important decisions with a licensed attorney.

Studded Tires in states bordering Washington

The same rule in each neighboring state LawLert has verified, from that state’s own official source.

IdahoConditional
Idaho allows studded tires only from October 1, 2026 through April 30, 2027. …
Verified Oct 3, 2026 · Source: legislature.idaho.gov · Full Idaho rule →
OregonConditional
Studded tires are legal in Oregon only from November 1 through March 31; outside that window, using tires with metal studs on a highway is a Class C traffic violation under Or. Rev. Stat. 815.160. ODOT may shorten or lengthen the period in areas it designates. Exemptions include tires with retractable studs, emergency vehicles and ambulances in an emergency, and school buses with a loaded weight of 10,000 pounds or more. See Or. Rev. Stat. 815.160 and 815.165 and the Oregon Department of Transportation (ODOT).
Verified Oct 17, 2026 · Source: oregon.gov · Full Oregon rule →

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