Second update: Caltrans says the highway will remain closed overnight and Christmas Day. A contractor has been hired to clear a debris field and repair a 60-foot-long stretch of the highway at Partington Ridge Road.
The highway is shut down just south of the Deetjens Big Sur Inn (mile marker 42) and at Lucia (mile marker 23).
Caltrans hopes to have one lane reopened by the end of the week.
A second slide south of Gorda at mile marker 7 was clear at noon so there is no longer a closure at Ragged Point.
Update: Highway 1 will remain closed in two locations south of Big Sur as crews work to assess the damage caused by two rock slides and start cleanup efforts, according to Caltrans.
The rock slides happened Sunday about 5 p.m., according to a news release from the agency.
The highway is shut down at Partington Ridge Road (mile marker 38.70) and at Ragged Point in San Luis Obispo County. Caltrans officials said they do not know yet when Highway 1 will reopen.
Businesses in the Big Sur community remain open. Motorists can take alternative routes on highways 68, 101, 46 and Nacimiento-Fergusson Road.
Original story: Highway 1 is closed north of Ragged Point because of a rock slide Sunday afternoon, a Caltrans spokesman confirmed.
No injuries have been reported, but because it is dangerous to work at night, crews will assess the slide in daylight to determine when the highway will reopen.
Motorists are advised to seek alternate routes.