The road was closed Thursday after a massive chunk of hillside - about 75 to 100 feet of it - gave way following this week's rainstorms.
Officials were concerned about the integrity of the road and closed it from the 8300 block to the 210 Freeway.
Engineers and geologists have examined the roadway and believe it has maintained its integrity. Crews were removing closure signs and K rails and reopening the road Sunday night.