Right after the small store at Laloki River Gorge is the turn-off to Varirata National Park which, at 1000 hectares and over 800m high, is the highlight of the Sogeri Rd. It's 8km from the turn-off and you'll find six clearly marked walking trails ranging from 45 minutes to three hours long, and some excellent lookouts back to Port Moresby and the coast. The bird-watching here can be rewarding, with an array of kingfishers and Raggiana birds of paradise as highlights.
It's possible to camp here, but unless you're in a large group, it's potentially unsafe. The best place is on the grass outside the derelict huts. There are pit toilets. Speak to the ranger-in-charge (if you can find him!).