UPDATE (2:36 p.m.) - All northbound lanes of Highway 101 are now open through Gaviota.
UPDATE (12:56 p.m.) - The number 2 lane of the highway is now open to traffic. The fast lane remains closed.
(12:12 p.m.) - The northbound lanes of Highway 101 just south of Highway 1 in the Gaviota area were closed Monday due to a rock slide.
It happened at around 11:15 a.m.
According to the California Highway Patrol, several large boulders were reported to be in the roadway.
The southbound lanes of traffic remained open.
This is a developing story and will be updated with new information as it becomes available.