We mean it this time, studded tires must now be removed no later than midnight this Saturday, April 5th (The normal removal date would have been Monday, March 31 at midnight).
Drivers who are not planning mountain pass travel are encouraged to remove their studded tires now. Motorists planning mountain pass travel after that date should carry chains.
Idaho drivers should note that, although studded tires are legal in that state until April 31st, Idaho vehicles entering Washington cannot have studded tires after April 5.