Boyndaminup

Boyndaminup National Park is a 5,565-hectare protected area in the southern jarrah forest country of southwestern Western Australia, situated between Nannup and Bridgetown. The park protects a representative section of the jarrah-marri forest, including the headwaters of the Blackwood River catchment. Its name derives from the Noongar language, reflecting the long cultural association of Noongar people with this forested landscape. The park is managed by DBCA and forms part of the broader network of conservation reserves protecting the jarrah forest bioregion.

Boyndaminup supports the full suite of jarrah forest fauna. Western grey kangaroos, short-beaked echidnas, brush wallabies, and quendas are common. The nocturnal western ringtail possum — listed as critically endangered — may occur in marri-dominant stands. Carnaby's black-cockatoo and forest red-tailed black-cockatoo feed on marri nuts and banksias. Peregrine falcons nest on rocky outcrops. Reptile diversity is high, including bobtail lizards, dugites, and tiger snakes. Freshwater invertebrates inhabit streams draining into the Blackwood system.

Jarrah (Eucalyptus marginata) and marri (Corymbia calophylla) dominate, forming tall open forest over an understorey of sheoak (Allocasuarina fraseriana), snottygobble (Persoonia longifolia), and various proteaceous shrubs. Riparian zones support paperbarks (Melaleuca rhaphiophylla) and sedges. Spring wildflowers include hoveas, hibbertias, and native orchids. The southwest jarrah forest is a globally recognised biodiversity hotspot.

The park sits on the Darling Plateau — a deeply weathered Archaean granite-gneiss basement overlain by laterite and lateritic gravels. The laterite profile reaches depths of 20–30 metres in places. Lateritic breakaways with ironstone gravels occur on slopes and ridge crests. Stream valleys have cut through to deeply weathered saprolite and fresh granite. The Precambrian basement is among the world's oldest stable continental surfaces.

Mediterranean climate with warm, dry summers and cool, wet winters. Annual rainfall ranges from 800–1,000 mm. The jarrah forest depends on deep-rooting trees accessing subsoil moisture during summer. Fire frequency is naturally high due to summer lightning; the forest has evolved with a fire cycle of approximately 7–15 years.

Boyndaminup lies within Noongar boodja, specifically the country of the Bibbulmun and Wardandi Noongar groups. Noongar people used the jarrah forest extensively for food, timber, and cultural practice. The Blackwood River system was a major resource corridor. European settlers entered the area in the 1840s–1860s for timber-cutting and agriculture. Timber mills operated throughout the surrounding forest region from the late nineteenth century.

Boyndaminup was gazetted as a national park to protect representative jarrah forest on the Darling Plateau. The park is contiguous with State Forest and other conservation reserves. DBCA manages the park under an integrated conservation framework that also guides broader jarrah forest management across millions of hectares.

Boyndaminup offers bushwalking through mature jarrah-marri forest, with opportunities to observe wildlife, particularly at dawn and dusk. Seasonal wildflower displays in spring are a highlight. The Blackwood River catchment provides beautiful forest creek environments. The park is popular with birdwatchers seeking black-cockatoos and forest raptors.

Access via the South Western Highway between Nannup and Bridgetown. The park has no formal visitor facilities. Visitors should be self-sufficient with water and supplies. Fire restrictions apply November–April. Day use only; no camping.

Phytophthora cinnamomi (dieback) is the most serious conservation threat, affecting proteaceous understorey and weakening jarrah trees. Declared Rare Floras are present in the park. Feral pigs cause significant ground disturbance and spread dieback. Prescribed burning is conducted to maintain forest health and reduce fuel loads. The southwest jarrah forest as a whole has experienced significant decline from dieback, logging, and climate drying.