St Columba Falls

St Columba Falls State Reserve in northeast Tasmania protects one of the tallest permanent waterfalls in Tasmania, where the St Columba Creek plunges approximately 90 metres over a dolerite cliff face in a spectacular drop surrounded by tall rainforest. The falls are fed by a 4,200-hectare catchment from the foothills of the Ringarooma Valley and maintain strong permanent flow throughout the year. The reserve is located near Pyengana in the Ringarooma Valley, approximately 25 kilometres south of St Helens. The combination of the impressive waterfall and the surrounding rainforest makes this one of northeast Tasmania's most visited and photographed natural attractions.

The rainforest and wet eucalypt forest surrounding St Columba Falls supports diverse fauna of northeast Tasmania. The Tasmanian devil and spotted-tail quoll inhabit the reserve and surrounding forested areas. Platypus occur in the creek below the falls, and the common wombat grazes the forest margins. The endemic green rosella, Tasmanian scrubwren, and yellow-throated honeyeater are resident forest birds. Wedge-tailed eagles soar above the forested valleys hunting for prey, and peregrine falcons nest on dolerite cliffs. The falls create a permanently moist microclimate around the plunge pool that supports specialised moss and fern communities harbouring diverse invertebrates.

The vegetation around St Columba Falls includes tall wet eucalypt forest dominated by swamp gum on the drier slopes and transition to cool temperate rainforest of myrtle beech in the sheltered gully near the falls. Tree ferns create a lush understorey along the creek and in the moist forest near the base of the falls. The cliff faces adjacent to the falls are draped in mosses and ferns maintained by the constant spray and seepage. The forest floor is carpeted with mosses, liverworts, and native orchids that bloom in spring. The combination of tall wet eucalypt forest and sheltered rainforest creates a botanically diverse environment within the reserve.

St Columba Falls drops 90 metres over a Jurassic dolerite cliff, one of the tallest single drops of any waterfall in Tasmania. The dolerite here was intruded approximately 170 million years ago as a massive sill into older sedimentary rocks, and its resistance to erosion creates the sheer face over which the falls plunge. The plunge pool at the base has been excavated into softer underlying rocks by the energy of the falling water and carried sediment. The creek above the falls flows across the dolerite plateau of the Ringarooma Valley uplands, gathering the substantial catchment flow that sustains the impressive waterfall throughout the year.

The Pyengana and Ringarooma Valley receives moderate to high rainfall typical of northeast Tasmania's inland ranges, with annual precipitation averaging around 1,200 millimetres. The large catchment area and reliable rainfall ensure permanent strong flow over the falls throughout the year, with the highest flows occurring in winter and spring. Summer temperatures in the valley are mild, averaging 18 to 24 degrees Celsius, and the rainforest near the falls provides cooling shade. The reserve is accessible and enjoyable in all seasons.

The Ringarooma Valley was traditionally Pyemmairrener and Plangermaireener Palawa country. European settlers began clearing the valley for dairy farming from the 1870s, and the rich volcanic and basaltic soils of the Ringarooma Valley became some of northeast Tasmania's most productive agricultural land. The falls were documented by early European settlers and became known as one of the natural wonders of the northeast. Pyengana, the nearest township, became associated with the St Columba Valley Cheese and Holy Cow Café, reflecting the dairy farming heritage of the area.

St Columba Falls State Reserve was established to protect the spectacular waterfall and surrounding forest as one of northeast Tasmania's premier natural attractions. The reserve's management has focused on providing visitor access to the falls while protecting the sensitive rainforest ecosystem from the significant visitor pressure generated by the falls' popularity.

The walk to St Columba Falls is the reserve's primary attraction, a return walk of approximately two kilometres through tall wet eucalypt forest and rainforest to the viewing platform at the base of the 90-metre falls. The walk is relatively flat and accessible to most visitors, taking approximately one hour return. The falls are most impressive in spring and winter when flows are at their highest, but the 90-metre drop creates an impressive spectacle year-round. The mossy, ferny forest along the track adds to the experience.

St Columba Falls State Reserve is located near Pyengana, approximately 25 kilometres south of St Helens on the northeast coast. A car park, toilet, and picnic facilities are provided at the reserve entry. The reserve is typically visited in conjunction with Pyengana's artisan cheese and café experiences. A national parks pass is required. Accommodation is available in St Helens and along the northeast coast.

Conservation management focuses on protecting the rainforest from invasive species and managing visitor impact on the relatively short but heavily used walking track. Phytophthora management protocols prevent introduction of this dieback pathogen. Track surface maintenance manages the erosion and slippage risk in the frequently wet conditions near the falls. The large catchment upstream is primarily in agricultural use, and water quality monitoring in the creek addresses potential impacts from agricultural run-off.