Police searched the area around the Sacramento River Trail in Redding on Thursday after a reported sighting of the suspect in three assaults.
The sighting was reported near the Sundial Bridge. The assaults happened Monday afternoon closer to the Diestelhorst Bridge.
Several officers and a Redding Police K-9 were part of the search.
They were assisted by a CHP helicopter.
The suspect was not located.
He is believed to be responsible for assaulting three women on the trail Monday afternoon.