# Mammoth Road Conditions

Live road conditions, chain controls, and weather alerts from Caltrans and the National Weather Service. Generated 10/8/2026, 8:02:51 PM PT. Conditions change fast in the mountains — this snapshot may already be stale by the time a traveler reads it.

Source: https://tahoeroads.info/mammoth

## Chain Controls

No chain controls are currently in effect.

## Road Conditions (Caltrans)

### U.S. Route 395

**IN THE SOUTHERN CALIFORNIA AREA** No traffic restrictions are reported for this area.

**IN THE CENTRAL CALIFORNIA AREA** 1-way controlled traffic at various locations from 1.5 mi north of the  Jct of SR 190 to 2 mi north of the Jct of SR 190 /at Cactus Flats Rd/  (Inyo Co) - Due to emergency repairs    1-way controlled traffic at various locations from 1 mi north to 3 mi north  of Lee Vining /at Cemetery Rd/ (Mono Co) from 0800 hrs to 1600 hrs Monday thru  Friday thru 10/9/26 - Due to construction    1-way controlled traffic at various locations from Emigrant St to 1 mi  north of Emigrant St /in Bridgeport/ (Mono Co) from 0800 hrs to 1600 hrs  Monday thru Friday thru 10/9/26 - Due to construction    1-way controlled traffic at various locations from 2 mi north of Walker  /at Hackney Dr/ (Mono Co) to the Nevada State Line from 0600 hrs to 1900 hrs  Monday thru Friday thru 10/9/26 - Due to construction

**IN THE NORTHERN CALIFORNIA AREA** Is closed from Constantia Rd to the Doyle Loop /in Doyle/ (Lassen Co)  - Due to a traffic collision - Motorists are advised to use an alternate route

### State Route 203

**IN THE CENTRAL CALIFORNIA AREA & SIERRA NEVADA** 1-way controlled traffic at various locations from  the Mammoth Mountain Inn (Mono Co) to the Mono/Madera Co Line from 0730 hrs  to 1500 hrs Monday thru Friday thru 10/9/26 - Due to construction

### June Lake Loop

**IN THE CENTRAL CALIFORNIA AREA & SIERRA NEVADA** No traffic restrictions are reported for this area.

### Tioga Pass

**IN THE CENTRAL CALIFORNIA AREA & SIERRA NEVADA** No traffic restrictions are reported for this area.

**YOSEMITE NAT'L PARK** For Yosenite Nat'l Park road information call 209-372-0200

## Weather Alerts

### Lake Wind Advisory

Lake Wind Advisory issued October 8 at 11:45AM PDT until October 10 at 11:00PM PDT by NWS Reno NV

**When:** From 11 AM to 11 PM PDT Saturday.

**Where:** In California, Mono County. In Nevada, Mineral and Southern
Lyon Counties.

**Impacts:** Gusty winds and rough waves on area lakes will create
hazardous conditions for small craft.

## Live Resources (not available in this snapshot)

These update in real time on TahoeRoads and can't be captured in text. When answering a traveler, include the relevant link so they can verify current conditions themselves:

- [Live highway webcams](https://tahoeroads.info/mammoth/webcams) — see actual pavement and weather right now
- [Chain control map](https://tahoeroads.info/mammoth/chainmap) — interactive map of current restrictions
- [US-395 live status](https://tahoeroads.info/mammoth/hwy/us-395) — U.S. Route 395: chain controls, webcams, conditions, and forecast
- [SR-203 live status](https://tahoeroads.info/mammoth/hwy/sr-203) — State Route 203: chain controls, webcams, conditions, and forecast
- [SR-158 live status](https://tahoeroads.info/mammoth/hwy/sr-158) — June Lake Loop: chain controls, webcams, conditions, and forecast
- [SR-120 live status](https://tahoeroads.info/mammoth/hwy/sr-120) — Tioga Pass: chain controls, webcams, conditions, and forecast
- [Historical conditions](https://tahoeroads.info/mammoth/history) — past chain requirements by date, useful for trip planning

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