Verkkospecial chain enforcement patrols by wsp will keep an eye on mountain passes this winter. Wsdot also encourages travelers to practice. Verkkodrivers can check out these winter driving pages for tips and information. Verkkowidespread damage to snowblower heads across the state contributed to the closure of several mountain passes, affecting travel for thousands of people. Select the mountain pass and year to see the snowfall report: Total snowfall for that day. Verkkomountain pass closure and opening dates. Historic opening and closing dates for chinook, cayuse and north cascades passes. Chinook pass sr 410. Verkkomountain passes & winter travel. Check current weather reports, view driving conditions and find tips for preparing for travel through our mountain passes. Verkkoas thousands of travelers make their way over the mountain passes for the holiday weekend, washington state officials are urging caution due to the possibility of snow. Here are some winter travel tips from wsdot: Check statewide pass conditions online before heading out or planning.