North Walk that extends from Sydney Cove to Newcastle. It is 25 km in length through Berowra Valley National Park and can be accessed via six separate locations, generating a variety of different walks. The track is suitable for overnight walks, as the Galston Gorge Campsite is located along the Benowie Walking Track. Although, this campground does not provide any water or facilities for campers. Features such as the Gulley Creek Falls, a small creek crossing, are also seen along the Benowie Walking Track. The Heritage Bridges Walk is an established bush-walk which begins at the constructed wetlands in Clarinda Street, Hornsby, and follows predominantly fire trails with views of the two bridges before ending at the bottom of Galston Gorge. Local flora and fauna Galston Gorge is the habitat for various native birds, mammals and reptiles. Approaching Berowra Creek, rainforest vegetation becomes dominant. Stands of Grey Myrtle Backhousia myrtifolia, ferns and water gums are native to this area. Possums and other nocturnal marsupials also reveal themselves at night. Along the Benowie Walking Track, commonly found flora includes Sydney Blue Gum, Blackbutt, She Oak, Sydney Peppermint and Smooth-barked Apple mixed with Coachwood, Blackwattle and Pittosporum. Commonly seen birds include honeyeaters, fantails, parrots, and various species of waterbirds such as the Pied Cormorant, White Faced Heron and Dusky Moorhen. More rarely, Satin Bowerbirds and Lyrebirds may also be seen. Before 2000, a population of feral chickens lived in the bushland. Chickens who were abandoned by semi-rural properties owners, assisted in the growth of this population. Hornsby Shire Council culled this population in 2000. Traffic regulations There are regular occurrences of traffic incidents in Galston Gorge, most commonly caused by large trucks becoming stuck at hair-pin bends, or on Tunks Creek Bridge. As of May 2018, over 100 over-length trucks have caused traffic blockages in Galston Gorge. The installation of new signage and a camera based detection system that utilises infrared technology incurs a $2,270 fine to any heavy vehicle over that attempts to enter Galston Gorge. A roundabout was installed on the Galston side of the Gorge to give heavy vehicles a chance to turn around and avoid heavy fines. Oversized vehicles continue to utilise Galston road, and have been involved in traffic incidents including one in which the Tunks Creek Bridge was damaged, and a diesel spill occurred. References Canyons and gorges of Australia Hornsby Shire