A Sydney man who was found dead with his hands tied behind his back in the Royal National Park had driven to the remote location with two men he had met recently on a gay social networking site.

The body of Jarrod Dark, 45, was discovered by police shortly after midnight on Tuesday on a walking track leading to Werrong Beach, a nudist beach also known as Hell Hole Beach, in the national park near Otford, south of Sydney.

Jarrod Dark: found dead with his hands tied behind his back. Credit:Facebook

It is understood Mr Dark, from Fairfield in Sydney's west, was found with his hands tied behind his back with his own belt.

Police said Mr Dark had travelled to the location with two men, aged 43 and 37, whom he had met on a social media site. Fairfax Media understands that site was a gay social networking site, and the trio had met up a number of times recently.