Forth Falls

Forth Falls State Reserve is a scenic reserve on the Forth River in northwestern Tasmania, protecting a series of cascades and falls in temperate rainforest along the upper Forth River valley. The reserve lies within the Great Western Tiers foothills, where the river descends rapidly from the Central Plateau through gorges and over rocky ledges before reaching the coastal plain. The falls and surrounding rainforest create a beautiful natural setting that has attracted visitors seeking waterfall experiences in the northwest region. The reserve protects a representative section of the wet forest and riparian ecosystem characteristic of the Tiers foothills.

The riparian and wet forest habitat of Forth Falls supports diverse fauna. The platypus is present in the Forth River and its tributaries, where the clear, cold water and rocky substrate provide ideal habitat. The spotted-tail quoll inhabits the denser forest areas, and the Tasmanian pademelon browses the forest margins. Waterbirds including the azure kingfisher and grey shrike-thrush inhabit the river corridor. The dense wet forest supports Tasmanian scrubwrens, thornbills, and various honeyeaters. The forest's structural complexity, with tall trees, dense understorey, and fallen logs, provides diverse habitat niches for forest-dependent fauna.

The vegetation surrounding Forth Falls is dominated by tall wet eucalypt forest transitioning to cool temperate rainforest in the sheltered gully around the falls. Swamp gum and stringybark eucalypts form the tall canopy, beneath which myrtle beech, sassafras, and leatherwood form the rainforest understorey in the most sheltered and moist conditions. Tree ferns create a lush intermediate layer along the creek banks. Mosses and liverworts carpet the rocks and fallen logs around the falls, creating the characteristic moist, richly textured surface of cool temperate rainforest. The roar and spray of the falls maintain perpetually high humidity in the immediate fall area.

The Forth River at Forth Falls is cutting through the dolerite-capped terrain of the Great Western Tiers, with the falls occurring where the river encounters particularly resistant rock layers or structural features. The valley walls expose dolerite and older sedimentary rocks that the river has carved through over geological time. The falls and cascades result from the variable erosion resistance of different rock types and structural features such as joints and faults that the river has exploited. The river's energy in cutting through the Tiers landscape is evident from the steep gradient of its course from the plateau to the coastal plain.

Forth Falls experiences the high rainfall climate of the Great Western Tiers foothills, with the escarpment intercepting moisture-laden westerly winds and producing annual rainfall typically exceeding 1,500 millimetres. The sheltered river valley creates a locally moist and cool microclimate that sustains the rainforest and maintains permanent strong water flow over the falls. Winters are cool with frequent frosts at the reserve elevation, while summers are mild. The falls are at their most dramatic following heavy rain when flows are maximised, while in dry summer periods flow may be reduced.

The Forth River valley was part of the traditional territory of the Tommeginne people of northwest Tasmania. The river and its tributaries provided important resources including fish and freshwater mussels. European settlers explored the Forth River valley from the 1820s as timber getters sought the valuable huon pine, celery-top pine, and other timber species in the river valleys of the northwest. A timber tramway operated in the area for many decades, harvesting the forests of the Forth valley. Remnant infrastructure from this period can sometimes be observed in the surrounding landscape.

Forth Falls State Reserve was established to protect the scenic waterfall and surrounding rainforest as an accessible natural heritage area in the northwest coast hinterland. The reserve contributes to the network of protected areas along the Great Western Tiers, protecting representative samples of the diverse ecosystems found along the escarpment. Walking track development has made the falls accessible while managing visitor impact on the sensitive riparian vegetation.

The walk to Forth Falls is the primary attraction, following the river through rainforest to the main falls and cascades. The walk is suitable for most visitors and provides an immersive experience of the tall wet forest and riparian environment. The falls themselves, set among mossy rocks and overhanging ferns, create a photogenic and peaceful destination. Extended walking options connect the reserve with other areas of the Great Western Tiers. Spring and autumn offer particularly pleasant walking conditions when the forest is most vivid and flows over the falls are strong.

Forth Falls State Reserve is located south of Forth in the Devonport hinterland of northwest Tasmania, accessed via roads through the farming country south of the coastal plain. Car parking and basic facilities provide the walk starting point. The reserve is typically visited as a half-day excursion from Devonport or Ulverstone. A national parks pass is required. The nearest towns of Devonport and Ulverstone provide accommodation and visitor services.

Conservation management at Forth Falls focuses on maintaining the rainforest and riparian vegetation in good condition and protecting the water quality of the Forth River. Phytophthora cinnamomi management is important given the sensitivity of the rainforest understorey species to this pathogen. Walking track maintenance prevents erosion of the fragile streamside soils. Weed management targets invasive plants in disturbed areas. The Forth River is an important freshwater ecosystem, and conservation of its water quality and flow regime supports the diverse aquatic fauna including platypus and native galaxiid fish.