Popran National Park
There are not many trig stations in this national park on the Central Coast, which is between the Pacific Motorway and the Hawkesbury River. They are generally hidden in thick bush and require some bushwalking and navigation to reach.
Dharug National Park
Some of the hardest-to-reach trig stations lie in the rugged Dharug National Park. Although a handful are near bushwalking tracks or firetrails, many of them require a few hours of tough off-track bushwalking to reach.