Tasmania · Attraction
Cascade Dam
Historic dam above the rainforest
schedule 1 min read / Updated Jun 2026
The Cascade Dam stands 23 metres high and 145 metres long on the Cascade River, about four kilometres upstream of Derby, and carries the weight of the town's most dramatic history. The original dam at this site collapsed on 4 April 1929, sending a 30-metre wall of water and debris into Derby and killing 14 people. The rebuilt dam, completed in 1936, now supplies water to Derby and feeds the Winnaleah Irrigation Scheme, while the surrounding forested gorge draws visitors seeking a quiet escape from the trail network.
Access is via Cascade Dam Road, which turns off the Tasman Highway at the eastern edge of town at the Derby Town Hall. The road can be driven to a parking area at the dam itself, or walked as a return trip of roughly two hours through regenerating forest. The dam wall offers striking views over the impounded reservoir and the dense canopy below, and the site is popular for picnicking and fishing, with the reservoir holding a healthy population of brown trout (a current angling licence is required for all fishers aged 14 and over).
The Cascade Dam is a free, open-access site with no formal facilities on site, so visitors should bring water and supplies from Derby. The area is best visited in fine weather, as the access road can be muddy after rain. Combined with a visit to the Derby Schoolhouse Museum and a walk through the town's historic streetscape, the dam makes for a satisfying half-day heritage excursion that adds meaningful depth to a Blue Derby mountain bike trip.
Scenic views
