Los Angeles Fire officials sent a rescue helicopter to possibly lift the man out of the park, but the gravely ill man was pronounced dead at the scene.
His body was hoisted from the scene by a helicopter.
Officials say it appears the man died from natural causes. No further information was released.
A second hiker was pronounced dead in the San Jacinto Wilderness area in Riverside County Sunday.
Rescuers say the elderly man was about half-a-mile from Wellman's Divide above the Palm Springs tram.
Dispatchers received the call for help around 2:30 p.m., but he was pronounced dead at the scene.
Temperatures reached the upper-80s across the Southland, according to the National Weather Service. It remains unclear if the heat played a role in their deaths.
CNS contributed to this report.
