According to the San Diego Union-Tribune, Julien Hug's body was found at 11am PST in a remote area off State Route 74.
Riverside County Sheriff's Deputy Melissa Nieburger told the newspaper that the cause of Hug's death is under investigation, saying that the place where he was discovered is an area "you would need to hike into".
Hug appeared on the fifth season of ABC's The Bachelorette, competing for star Jillian Harris.
Fellow contestant Kiptyn Locke said that it was "crushing news", adding: "[Julien was] one of the most positive, standout people I have met.
"He was always trying to help other people. From the very first time I met him, he was just a very selfless guy."