Travel through the Sierra Nevada overnight Friday was disrupted by a massive boulder that fell onto U.S. Highway 50 at Echo Summit.
Caltrans said crews worked through the night using large drilling tools to prepare to blow up the rock.
Highway 50 was closed around 6 p.m. Thursday due to the rock slide. Crews were scheduled to perform blasting operations Friday morning and repair a guard rail damaged by the rocks.
Get Southern California news, weather forecasts and entertainment stories to your inbox. Sign up for NBC LA newsletters.
Caltrans deemed the roadway conditions safe for motorists around 3 p.m. and the highway reopened.
Motorists should allow at least one-hour extra travel time to reach South Lake Tahoe. Alternate routes available on the Caltrans website.