Idaho Studded Tires Laws (2026)

Conditional: Idaho allows studded tires only from October 1, 2026 through April 30, 2027.

ConditionalVerified Oct 3, 2026

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Idaho allows studded tires only from October 1, 2026 through April 30, 2027. Idaho Code 49-948 prohibits motor vehicles, trailers and semitrailers with tires having built-in studs on public highways between the first day of May and the thirtieth day of September annually, a recurring annual window dated here for the current season, so the studded season opened on October 1, 2026. The Idaho transportation board may grant special exemptions from the prohibited dates if it finds that enhancements to public safety outweigh the increased pavement wear.

Official source: legislature.idaho.gov →

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

Studded Tires in states bordering Idaho

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

MontanaConditional
Studded tires are legal in Montana only from October 1, 2026 through May 31, 2027. …
Verified Oct 3, 2026 · Source: mca.legmt.gov · Full Montana rule →
NevadaConditional
Studded tires are legal in Nevada only from October 1 through April 30. They're prohibited the rest of the year. See Nev. Rev. Stat. 484D.510.
Verified Jul 22, 2026 · Source: leg.state.nv.us · Full Nevada 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 →
UtahConditional
Studded tires are legal in Utah only from October 15 through March 31, with studs no more than 0.050 inches; outside that window they are prohibited. They are not allowed on vehicles over 9,000 pounds, except emergency and school vehicles. See Utah Code 41-6a-1636.
Verified Jun 20, 2026 · Source: le.utah.gov · Full Utah rule →
WashingtonConditional
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).
Verified Jun 20, 2026 · Source: app.leg.wa.gov · Full Washington rule →
WyomingPermitted
Studded tires are legal year-round in Wyoming. Studs must not materially injure the road surface. See Wyo. Stat. 31-5-956.
Verified Jul 22, 2026 · Source: wyoleg.gov · Full Wyoming rule →

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