Seasonal closure · SR-4 · California
Closing date set by conditions. Caltrans aims to reopen before Memorial Day. Below: what the Caltrans QuickMap feed is posting for SR-4 right now, and the dates Caltrans gives, quoted from its own page.
“goal of safely reopening the highway to motorists prior to Memorial Day”
Source: dot.ca.gov/caltrans-near-me/district-10/district-10-popular-links/mountain-passes, read October 2, 2026.
California's DOT traveler site. The list of record for closures, restrictions and detours.
Winter roundupEvery seasonal closure MileCheck lists for California, with the dates each agency gives.
Road conditionsEvery closure and crash Caltrans QuickMap is posting, on one map with the mile marker.
CamerasEvery Caltrans QuickMap camera on one map, with the route and mile marker where the DOT gives one.
Date set each year by conditions That is what Caltrans publishes, read October 2, 2026. The gate goes in when the snow does, so the date moves from year to year. No 2026-27 dates were posted on the source page when it was read.
Goal: before Memorial Day (2026 reopened May 6) Plowing and avalanche work set the day, and the agency announces it when the road is ready.
Alpine County. The rest of SR-4 is handled like any other road in California.
Caltrans QuickMap is the official source for the state highway. The block at the top of this page reads the same Caltrans QuickMap feed every five minutes and lists what is posted for SR-4. If the feed cannot be reached, the page says so instead of showing an empty list.
The app shows the same Caltrans QuickMap alerts on your route, ahead of your position, with the mile marker you are passing. The mile marker works offline in all 50 states. Live alerts are part of MileCheck Premium.
Your mile marker shows even offline. Caltrans QuickMap alerts on your route and the nearest camera are part of MileCheck Premium and need a connection to update. Runs on CarPlay and Android Auto.
The Monthly Highway Report
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