The area is south of Half Moon Bay.
WASHINGTON WILDLIFE OFFICIALS KILL BLACK BEAR THAT ATTACKED WOMAN WALKING DOG
A child was attacked by a California mountain lion on Tunitas Creek Road in San Mateo County. (Fox News)
The victim was conscious while being taken to the hospital but there was no immediate word on the child's condition.
Other details weren't immediately released.
The California Department of Fish and Wildlife was investigating the attack.
Mountain lion attacks on humans are rare. Around 20 confirmed attacks have occurred in California in more than a century of record-keeping, according to the Department of Fish and Wildlife.
Last September, a 7-year-old boy was bitten by a mountain lion while walking with his father around dusk in a park near Santa Clarita in Southern California. The father scared the animal away and the child was treated for relatively minor wounds.