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wiggs

(8,501 posts)
Mon Oct 13, 2025, 01:03 AM Monday

Sierra road closures tomorrow?? We are hiking around Mammoth Lakes and were going to stay till

Tuesday. However, we are getting spotty reports that Tioga and Sonora passes are closing mid day monday...until Thursday. Four of our group go back to the Bay Area that way. So if the reports are accurate, they will have to leave a day early.

Seems very unusual those major routes across the Sierras would close for that amount of snow.

Does anyone know the reports to be true? And if so, do the closures have something to do with the shutdown/emergency response/forecasting??

Disappointing

7 replies = new reply since forum marked as read
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Lifeafter70

(667 posts)
1. I'm going to reno on wed delaying it a day cause of snow
Mon Oct 13, 2025, 01:31 AM
Monday

It's supposed to clear up by Wednesday afternoon on the 80.

Edited to add: I used to live in Mammoth years ago and the tioga pass can be bad when icy.

usonian

(21,479 posts)
2. Current conditions:
Mon Oct 13, 2025, 01:35 AM
Monday
https://www.nps.gov/yose/planyourvisit/conditions.htm

CONDITIONS
Winter storm forecast: be prepared for road closures and carry tire chains

Road closures (including Tioga Road and/or Glacier Point Road) and tire chain requirements are possible starting October 13. Call 209/372-0200 (then 1, 1) for current road status within Yosemite National Park.
Tioga Road (Hwy 120 through the park) temporarily closing on Monday at 2 pm

Tioga Road (continuation of Highway 120 through the park) will temporarily close on Monday, October 13, at 2 pm due to a forecast of snow. Call 209/372-0200 (then 1, 1) to check road conditions in the park.more
Glacier Point Road temporarily closing on Sunday (Oct. 12) at 8 pm

Glacier Point Road will temporarily close on Sunday, October 12, at 8 pm due to a forecast of snow. Call 209/372-0200 (then 1, 1) to check road conditions in the park.more

WEATHER
https://forecast.weather.gov/MapClick.php?lon=-119.61292&lat=37.73639#.WX_I0oVlDYV

This is for the valley, elevation 4000 ft. Tioga Pass is 9,945 ft.

Tonight
Increasing clouds, with a low around 34. Northeast wind around 5 mph.

Columbus Day
Rain likely. Cloudy, with a high near 61. West northwest wind 5 to 15 mph becoming south in the afternoon. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

Monday Night
Rain. The rain could be heavy at times. Low around 30. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between 1 and 2 inches possible.

Tuesday
Rain before 2pm, then showers and possibly a thunderstorm after 2pm. High near 54. South southwest wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

Tuesday Night
Rain likely before 2am, then a chance of rain and snow. Mostly cloudy, with a low around 23. South southwest wind 5 to 10 mph becoming east after midnight. Chance of precipitation is 60%. Little or no snow accumulation expected.

Wednesday
Mostly sunny, with a high near 60. Light and variable wind becoming west 5 to 10 mph in the afternoon.

3Hotdogs

(14,691 posts)
3. Dunno... seem to remember somethin' about somethin called Donner Pass.
Mon Oct 13, 2025, 10:05 AM
Monday

I drove there about 20 years ago. It is above the tree line but I didn't. see no bodies or nuthin.

Sorry about your hike. I am treasurer of my hiking club. Cancelling is disappointing.

mike_c

(36,792 posts)
4. it's October
Mon Oct 13, 2025, 12:30 PM
Monday

I don't think those closures are unusual for this time of year. Snow comes early on the high passes. Won't be long until most of them are closed for the year.

wiggs

(8,501 posts)
5. Yep. most of our group left for the bay area...we have the hot tub and remaining bourbon to ourselves. Soaked during
Mon Oct 13, 2025, 01:19 PM
Monday

snow flurries this morning.

wiggs

(8,501 posts)
7. We go south from Mammoth to OC...may run into some chain requirements between here and bishop but after that it's just
Mon Oct 13, 2025, 07:32 PM
Monday

wet.

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