# Mammoth Road Conditions

Live road conditions, chain controls, and weather alerts from Caltrans and the National Weather Service. Generated 7/10/2026, 3:46:49 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** 1-way controlled traffic at various locations from Randsburg Cuttoff to  Atolia Post Office Rd (San Bernardino Co) 24 hrs a day 7 days a week - Due to  construction

**IN THE CENTRAL CALIFORNIA AREA** 1-way controlled traffic at various locations from 1.6 mi south of Grant  to Cactus Flats Rd /in Grant/ (Inyo Co) 24 hrs a day 7 days a week  - Due to construction

**IN THE NORTHERN CALIFORNIA AREA** A high wind advisory is in effect from Johnstonville (Lassen Co) to  the Nevada/State Line - Travel is not recommended for campers, trailers, or  permit loads

### State Route 203

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

### 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

No active weather alerts.

## 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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