Trail summary
Hike overview
The Glen Brook Trail is a 4.8-kilometre, grade 3 hike in John Forrest National Park, Western Australia. This well-marked loop follows Glen Brook in an anti-clockwise direction, winding past granite outcrops, through shaded gullies, and up to the dam before continuing deeper into the park. For those looking for a shorter walk, a 2.2-kilometre loop provides a more relaxed option while still capturing the beauty of the area. Several bridges and linking trails near the car park offer additional flexibility, making this walk suitable for a range of visitors.
John Forrest National Park, set in the Darling Ranges, is Western Australia’s oldest national park and is home to diverse landscapes, from heathlands to open wandoo woodlands and mixed jarrah-marri-wandoo forests. The Glen Brook Trail highlights this variety, with sections of dense vegetation giving way to rocky slopes and open bushland. In the cooler months, the brook flows more freely, creating peaceful spots along the way where you can pause and take in the surroundings.
For those completing the full 4.8-kilometre loop, the trail extends into the park’s southern section, reaching the headwaters of Glen Brook. The terrain is varied, with some rocky sections requiring careful footing, so it’s worth keeping an eye on the marker posts, especially near the granite outcrops. Whether you choose the shorter loop or explore the full circuit, this walk offers a rewarding way to experience the natural beauty and changing landscapes of John Forrest National Park.
Map and GPX file
<h3>Glen Brook Dam Trail (4.8km)</h3>
Max elevation: 189 m
Min elevation: 151 m
Total climbing: 57 m
Total descent: -60 m
<h3>Glen Brook Dam Loop (2.2km)</h3>
Max elevation: 189 m
Min elevation: 151 m
Total climbing: 58 m
Total descent: -59 m
Getting there
To reach the trailhead for the Glen Brook Dam Trail, head east along Great Eastern Highway and turn north into John Forrest National Park. Once inside the park, you’ll find the trailhead sign just across the brook, about 100 metres from the registration point. To get there, simply cross the bridge over Jane Brook, located directly north of the ranger's office. While the trail was initially designed to be walked in a clockwise direction, it has since been found to be equally enjoyable when tackled anticlockwise. When you arrive at the trailhead, you can decide which direction suits you best before beginning your adventure.
Photo gallery
Main image: Melissa Marrie
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Track grade
Grade 3 (Moderate) - Walks for Most Fitness Levels: Grade 3 on the AWTGS represents moderate walking tracks. These are ideal for walkers with some fitness who are comfortable with some hills and uneven terrain. While suitable for most ages, some bushwalking experience is recommended to ensure a safe and enjoyable experience. Tracks may have short, steep hill sections, a rough surface, and many steps. The total distance of a Grade 3 walk can be up to 20 kilometers.
About the region
John Forrest National Park, located just 30 minutes from Perth, is one of the highlights of this area. As the first and oldest national park in Western Australia, it offers an array of scenic views, walking and cycling trails, and historic structures set against a backdrop of diverse wildlife. Upon arrival at the park, visitors can find numerous picturesque locations ideal for picnicking or using one of the available barbecues. The park features two waterfalls that flow during winter and spring—an especially beautiful time to witness the vibrant wildflowers in bloom.
The trails within John Forrest National Park lead adventurers through towering jarrah, marri, flooded gum, swamp peppermint, and paperbark trees. An intriguing feature is the Swan View Tunnel, which adds an element of mystery to your walk. While exploring these paths, you may encounter native wildlife such as western grey kangaroos lounging in their natural habitat. For those who prefer cycling, the Railway Reserves Trail offers an excellent opportunity to explore the area on two wheels. Whether you opt for a hike on one of the many trails or simply visit the lookouts, you’ll have plenty of chances to capture memorable photos showcasing views of Perth and the Swan Coastal Plain.
The cultural history of this region is equally significant. The Nyoongar people have inhabited the Midland to Guildford area long before European settlement. Historical accounts suggest that this area served as a hunting ground and that Jane Brook Valley was an ancient travel route used by the Nyoongar people to navigate across the Darling Scarp towards more open lands in the east. Jane Brook holds cultural importance as well; it is associated with the Dreamtime serpent known as Waugal, with local traditions stating that the rocks along this brook are remnants of this mythical creature.
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Let someone know
Adventure with Confidence: Register Your Trip Plans
Before you hit the trail, take a moment to fill out our trip intentions form. It’s a simple way to share important details about your hike with family or friends. If things don’t go as planned and you’re not back on time, they can easily notify emergency services, helping to ensure a quick response and reducing worry. Enjoy your outdoor adventure knowing that you’ve taken a smart step for your safety.
Gear to consider
What you carry in your pack depends on factors like weather, terrain, time of year, the type of adventure, and your personal preferences. Unsure what gear to bring? My free planning, food, and packing checklists offer a great starting point, covering essentials for day hikes, overnight trips, and multi-day adventures. Use them as a guide to customise your kit to suit your needs, always prioritising safety above all else.
Explore safe
Plan ahead and hike safely! Always carry enough water and pack clothing layers to adapt to changing conditions. Bring essential safety gear, including a torch, a Personal Locator Beacon (PLB), and a reliable communication device. Check official government sources for trail updates, temporary closures, and access requirements. Before heading out, review local weather and bushfire advice, including warnings and planned burns. Most importantly, let someone know your plans before you go. Being prepared ensures a safer and more enjoyable hike! Stay Safe, Explore More, and Always #ExploreSafe
Acknowledgement of Country
Trail Hiking Australia acknowledges the Traditional Owners of the lands on which we hike and pay respects to their Elders, past and present, and we acknowledge the First Nations people of other communities who may be here today.