Verkkohistoric opening and closing dates for chinook, cayuse and north cascades passes. Chinook pass sr 410. Verkkomountain passes & winter travel. Map of all the mountain passes in washington state. Click on the green and white mountain pass icon for the specific pass’s. Verkkowhether you’re driving across washington state’s mountain passes or hitting the road when notoriously wet and slushy snow is expected in the seattle. Verkkofind details regarding hov lanes, toll roads, updates for mountain passes and what you need to know in advance for travel around the state.
