Caltrans uses three levels of chain controls on US-50. If the status above shows R-1, R-2, or R-3, you must carry chains or have snow tires installed. If the status shows R-0, no controls are in effect. Always verify these conditions with the official Caltrans road conditions site before departing, as road status can change rapidly.
Understanding Chain Controls
When Caltrans implements controls, they are mandatory. Failure to comply can result in fines or being turned around at a checkpoint.
- R-1: Chains or snow tires are required on all vehicles.
- R-2: Chains are required on all vehicles except four-wheel or all-wheel drive vehicles equipped with snow tires on all four wheels.
- R-3: Chains are required on every vehicle, with no exceptions. This level is rare and typically precedes a full road closure.
US-50 Elevation and Control Points
Caltrans manages chain controls across 15 distinct points on US-50. The highway rises from 2,240 ft at the Placerville East City Limits (Pointview) to 7,401 ft at the Echo Summit holding area.
The highest elevation control point is Echo Summit at 7,401 ft. Other major control points include:
- Chiapa: 6,453 ft
- Meyers: 6,341 ft
- Twin Bridges: 6,158 ft
- Strawberry: 5,728 ft
- Wright's Lake: 5,515 ft
- Fred's Place: 4,957 ft
- Pollock Pines (Sly Park): 3,982 ft
- Sand Flat: 3,953 ft
- Fresh Pond: 3,641 ft
- Saw Mill Under Crossing: 3,641 ft
- Riverton: 3,231 ft
- Camino Heights: 2,926 ft
- Placerville East City Limits (Pointview): 2,240 ft
Monitoring Conditions
Visual confirmation helps assess the severity of the weather. The US-50 at Echo Summit webcam (7,427 ft) provides the most direct view of conditions at the summit.
Other cameras along the route include:
- US-50 at Sierra at Tahoe / Echo Lake Eastbound (6,909 ft)
- US-50 at Myers (6,345 ft)
- US-50 at South Lake Tahoe / Pioneer Trail (6,351 ft)
- US-50 at Spooner Summit (7,156 ft)
For a broader view of the region, check US-50 road conditions or view all road conditions for the Sierra.
If the Road Closes
If US-50 closes due to heavy snow or accidents, there is no immediate, high-capacity alternative that bypasses the summit. Drivers should check Nevada 511 for updates on I-80 or other routes if travel is necessary. Do not attempt to use mountain backroads during a closure; these are often unmaintained and can leave vehicles stranded.