A body was found Thursday alongside Interstate 5 near the mouth of the Sweetwater River.
The discovery in a brushy area just west of the freeway at E Street in Chula Vista was reported shortly after 9 a.m., according to the California Highway Patrol.
The death did not appear suspicious, Chula Vista police Lt. John English said. A toxicology report is underway to determine if drugs and/or alcohol were a factor in the death.
California Highway Patrol Officer Salvador Castro said the body was identified as a 63-year-old man. He did not release the deceased's name.
The fatality prompted a closure of the onramp from E Street to southbound I-5 until further notice, Caltrans advised.