MileCheck

Seasonal closure · SR-108 · California

Is Sonora Pass open?

Closing date set by conditions. Caltrans aims to reopen before Memorial Day. Below: what the Caltrans QuickMap feed is posting for SR-108 right now, and the dates Caltrans gives, quoted from its own page.

Posted for SR-108 right nowCaltrans QuickMap via MileCheck · loading
Reading the Caltrans QuickMap feed…
Reports whose route is SR-108, or whose text names Sonora Pass. Reloads every five minutes. Ramp, lane and shoulder reports are labeled, not counted as closures.
Usually closes
Date set each year by conditions
Usually reopens
Goal: before Memorial Day (2026 reopened Apr. 30)
Closure segment
Tuolumne County; in winter closed eastbound at the California State Parks OHV SNO-Park and westbound at the Marine Corps Training Facility
2026-27 dates
No 2026-27 dates were posted on the source page when it was read.
Who decides
Caltrans.

What Caltrans says

“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 15, 2026.

Where to look next

Official source

Caltrans QuickMap

California's DOT traveler site. The list of record for closures, restrictions and detours.

 Winter roundup

Which roads close for winter in California?

Every seasonal closure MileCheck lists for California, with the dates each agency gives.

 Road conditions

California road conditions

Every closure and crash Caltrans QuickMap is posting, on one map with the mile marker.

 Cameras

California highway cameras

Every Caltrans QuickMap camera on one map, with the route and mile marker where the DOT gives one.

Questions, answered

When does Sonora Pass close for the winter?

Date set each year by conditions That is what Caltrans publishes, read October 15, 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.

When does Sonora Pass reopen?

Goal: before Memorial Day (2026 reopened Apr. 30) Plowing and avalanche work set the day, and the agency announces it when the road is ready.

Where exactly does it close?

Tuolumne County; in winter closed eastbound at the California State Parks OHV SNO-Park and westbound at the Marine Corps Training Facility. The rest of SR-108 is handled like any other road in California.

Where do I check whether Sonora Pass is open today?

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-108. If the feed cannot be reached, the page says so instead of showing an empty list.

Does the MileCheck app show this closure?

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.

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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.

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Also in California: Ebbetts Pass · Monitor Pass · Tioga Pass · Lassen Park Highway · All seasonal closures · Mountain passes · US closures map

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