The remains were discovered by a bicyclist along the Rio Hondo Riverbed bike path near Lincoln Avenue and San Gabriel Boulevard on July 31.
The person is believed to be a white or Hispanic man, between the ages of 35 and 55, with a partial denture at the back of his lower right jaw. No wallet or other identifying papers were found with him.
Anyone with information about John Doe No. 152 is urged to call the L.A. County Coroner Identifications Unit at (323) 343-0754 or the Coroner Investigations Division at (323) 343-0714.