A 31-year-old woman suffered serious injuries Sunday while riding a mountain bike on a dirt road off Mulholland Drive, a fire official said.
Firefighters and paramedics were dispatched to the stricken bicyclist at 10:52 a.m., said Erik Scott of the Los Angeles City Fire Department.
Scott said the biker was taken by helicopter to UCLA Medical Center in serious condition.
The incident occurred near the old Nike missile base on San Vicente Mountain, south of the Encino Reservoir, according to the fire department.
