The hike to Careys Peak (1,544m asl) involves a hard slog up the Corker Trail, with almost all the altitude gain in the first few kilometres. The reward is sweeping views from the peak towards the coast.
A wonderful loop walk from the Carrol Trig to The Cascades, The walk takes advantage of two "unofficial" tracks to descend to Middle Harbour Creek, with the majority of the walk along the shaded Middle Harbour Creek Track.
The Cascades Track is a short trail down to a large rock platform and picturesque waterhole on Middle Harbour Creek, in the northern suburbs of Sydney. Combines with the Bare Creek Track and Cambourne Trail for a longer loop walk.
The Casuarina and Lyrebird Loop is an interesting bushwalk through Garigal National Park. It combines the Casuarina Track, Lyrebird Track and Carroll Creek Track, and has some very nice sections along Middle Harbour and Carrol Creek.