At about 10:35 a.m., the Menlo Park Fire Protection District received numerous 911 calls reporting that a car had hit a man on a bicycle on southbound El Camino Real at Isabella Avenue, Atherton police Lt. Joe Wade said.
The victim, a resident of unincorporated Redwood City, was pronounced dead at the scene.
A preliminary investigation indicated the bicyclist was in a crosswalk when a southbound Toyota struck him, Wade said.
The driver of the Toyota stopped and was cooperating with investigators.
It does not appear that alcohol played a role in the accident, and it has not been determined whether speed was a factor, Wade said.
Southbound El Camino Real was closed between Watkins and Atherton avenues for about five hours while the accident was investigated.