Boorara-Gardner

Boorara-Gardner National Park is a remote protected area in the Southern Forests region of Western Australia, safeguarding tall karri and tingle forest ecosystems in the far southwest corner of the state. The park protects forest habitats that connect with the broader system of forest reserves in the region, providing important habitat corridors for wildlife movement between larger national parks. Karri (Eucalyptus diversicolor) — one of the world's tallest trees, reaching heights of 80 metres — dominates the wetter forest sections, while jarrah and marri forest characterise the drier transitional zones. The park exemplifies the grand old-growth forests of the southwest, with ancient trees supporting complex epiphytic and understorey communities.

The tall forests of Boorara-Gardner support an array of forest-dependent fauna. The critically endangered Carnaby's black cockatoo and the forest red-tailed black cockatoo are among the most significant avian inhabitants, with marri trees providing critical seed food. Tawny frogmouths nest in old-growth trees, while powerful owls hunt through the forest canopy at night. The southern brown bandicoot and chuditch (western quoll) occupy suitable understorey habitats. Western ringtail possums — a threatened species largely restricted to peppermint and karri forest — inhabit the tree canopy. Karri gliders (a subspecies of the greater glider) and brushtail possums use old hollow-bearing trees for den sites.

The park protects an exceptional diversity of tall forest ecosystems. Karri (Eucalyptus diversicolor) dominates the wettest sites, growing with spectacular rata-tree ferns in gullies and stream margins. Marri (Corymbia calophylla) and jarrah (Eucalyptus marginata) occupy intermediate zones. Red tingle (Eucalyptus jacksonii) — a massive tree found only in a small area of the far southwest — occurs in suitable habitats within the park. The understorey in karri forest includes native clematis, various ferns, native violets, and rich groundcover communities. The park contributes to preserving the diversity of tall forest types that once covered the southwest before extensive timber harvesting.

The park sits within the Leeuwin Block, an area of Precambrian basement rocks in the far southwest of WA, geologically distinct from the main Yilgarn Craton. These ancient metamorphic and granitic rocks provide the substrate for the deep, relatively fertile soils that support tall karri forest. The high rainfall in the southwest forest region (over 1,000 mm annually) has leached the soils over millions of years, but the karri ecosystem has adapted to extract nutrients through extensive root networks and mycorrhizal associations. Stream valleys within the park expose bedrock and support permanent waterways that provide critical water sources for wildlife.

The southern forests region receives among the highest rainfall in WA, with the park receiving 900–1,100 mm annually. Winters are mild and very wet, with significant fog and high humidity creating the moist conditions that tall karri requires. Summers are warm (20–28°C) and relatively dry, though coastal sea breezes moderate temperatures. Occasional extreme heat events can stress even the tall forest. Winter and spring are ideal for visiting — forests are lush, waterfalls are flowing, and the understorey wildflowers are at their peak. Fire risk, while generally lower than in drier forests, increases through summer and autumn.

The far southwest forests are within the traditional country of the Bibbulmun (Noongar) people, who managed these tall forest landscapes for thousands of years. The karri and tingle forests provided timber for shelter, materials for tools, and food resources including honey from native bees. The forest understoreys were managed through periodic burning to encourage food plants and hunting. European settlement brought a rapid and dramatic transformation — the timber industry targeted the tall forests almost immediately, with karri and jarrah exported globally from the 1880s. Large areas of the southern forests were clear-felled through the 20th century, making intact forest reserves like Boorara-Gardner particularly valuable.

Boorara-Gardner National Park was established as part of the expansion of the national park estate in the southwest forests following decades of advocacy by conservation groups. The park represents a hard-won addition to the conservation reserve system in a region where significant forest areas remain under timber production licensing. The park connects with adjacent reserves to form a broader protected area network for the southern forest region. Management focuses on protecting old-growth forest values, maintaining wildlife corridors, and managing the risk of catastrophic wildfire in an era of increasing fire weather.

The park offers bushwalking through magnificent tall forest, with opportunities to experience karri and tingle trees at their most impressive. Walking among 70-metre karri trees is a humbling experience, and the forest silence and complexity provide a stark contrast to urban environments. Wildflower displays in the understorey from August to November reward botanical visitors. Birdwatching in the forest canopy and understorey is rewarding for forest specialists. The remote character of the park appeals to visitors seeking genuine wilderness in southwest WA.

Boorara-Gardner National Park is accessed from the southern forests townships of Pemberton or Walpole. Unsealed forest roads provide access to the park, suitable for four-wheel drive vehicles. No formal camping facilities exist. Pemberton offers accommodation, food, fuel, and visitor services. Parks entry fees may apply. The best visiting season is August through November for wildflowers and pleasant weather. Summer visits are possible but temperatures can be uncomfortable. Track conditions should be checked before visiting in wet weather.

The southern forests face ongoing pressure from timber harvesting in surrounding State Forest, altered fire regimes, introduced predators (particularly cats and foxes), and Phytophthora cinnamomi dieback. Old-growth forest within national parks is legally protected but adjacent harvesting can affect wildlife movement and fire behavior. Western ringtail possum populations in the southwest forests are critically threatened, requiring active management to prevent local extinction. The park contributes to the 'Southwest Forests Alliance' conservation strategy seeking to protect remaining old-growth and high-conservation forest in the region.