Authorities made the disturbing discovery at about 2:30 p.m. in a canyon behind homes in the 27900 block of Rigel Drive.
The agency said deputies responded to an emergency call of "a person down."
It's still a very active scene as of Sunday night, and authorities are not saying if this is a homicide investigation. Investigators say it's possible the man could have slipped and fallen to his death, but it's still early in the investigation.
A Search and Rescue team arrived on the scene to help with the investigation.
No further details were immediately known. The investigation is ongoing.
This is a developing news story. Updates information will be added once it's available.