US-50 · CA
US-50 over Echo Summit: road conditions right now
Placerville, CA to South Lake Tahoe, CA
US-50 climbs the American River canyon from Placerville to Echo Summit, then drops down a cliffside grade into the Tahoe Basin and South Lake Tahoe. Caltrans puts the highway at about 7,200 feet near the summit, and its chain controls (R-1, R-2, R-3) apply on this stretch in storms.
Checking the forecast, NWS alerts, and DOT feeds for US-50 right now…
Why this stretch is hard in winter
- Near the summit the road is squeezed between a rock cut on one side and a steep drop toward the Tahoe Basin on the other, so a single crash or slide can close both directions.
- Rock slides close it too: in March 2022 a boulder closed US-50 at Echo Summit in both directions, and Caltrans sent drivers to I-80 instead.
- During chain controls, Caltrans has cut the speed limit on US-50 to 25 mph.
- R-2 means chains or traction devices on everything except 4WD/AWD with snow-tread tires on all four wheels; R-3 means chains on all vehicles, no exceptions.
What this page checks
- Hourly forecast at every checkpoint for the time you would be there: temperature, precipitation type and rate, gusts, visibility.
- Active National Weather Service watches, warnings, and advisories on the route.
- Snow on the ground (NOAA SNODAS) and the Weather Prediction Center winter impact outlook.
- Pavement temperature and surface state from state DOT road sensors, when you are leaving within a few hours.
- Chain controls, closures, and winter road condition reports from state DOT feeds where they are published openly.
- Seasonal closures of mountain roads the router might otherwise use.
Official sources for this corridor
Questions drivers ask about US-50
- Echo Summit or Donner Pass to Tahoe in snow?
- It depends on the storm and where you are going. Both are under Caltrans chain controls in storms. US-50 is a two-lane mountain highway near the summit, and I-80 is a divided interstate. Compare both on WeatherWeGo for the hour you would cross, and check Caltrans QuickMap.
- What do R-1, R-2 and R-3 mean on US-50?
- R-1: chains on all vehicles except passenger cars and light trucks with snow tires on at least two drive wheels. R-2: chains or traction devices on all vehicles except 4WD/AWD with snow-tread tires on all four wheels. R-3: chains on all vehicles, no exceptions.
Conditions change by the hour. This page is a planning aid built on public forecasts and DOT feeds; the road authority linked above has the final word on closures and chain requirements.
Other corridors: I-80 across Wyoming · I-70 through the Colorado mountains · I-80 over Donner Pass · I-90 over Snoqualmie Pass · I-84 through the Blue Mountains · I-15 over Cajon Pass · all corridors