4.4
(6)
468
riders
15
rides
Mountain bike trails North Harbour Aquatic Reserve traverse coastal areas and parklands within and around this marine protected zone in Sydney. The terrain includes varied elevations, from near sea level to moderate hills, offering views of the harbour and surrounding natural features. Riders can expect a mix of paved paths, fire trails, and singletrack sections. The region's landscape is characterized by diverse habitats, including rocky shores, sandy beaches, and nearshore reefs, with trails often providing scenic overlooks.
Last updated: May 6, 2026
4.8
(8)
157
riders
16.8km
01:26
210m
210m
Moderate mountain bike ride. Great for any fitness level. Advanced riding skills necessary.
8
riders
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.

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15
riders
69.8km
04:29
910m
920m
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary.
9
riders
28.1km
02:33
450m
450m
Hard mountain bike ride. Good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike.
2
riders
33.9km
02:19
330m
330m
Moderate mountain bike ride. Good fitness required. Advanced riding skills necessary.
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The World War II Gun Pits at North Head are concrete coastal defence emplacements built to help protect Sydney Harbour during the war. The four pits sit in exposed positions overlooking the ocean, reflecting their strategic role in monitoring and defence. Today, the remains are open to visitors and are a stark historical contrast to the surrounding coastal landscape.
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Manly Dam is a heritage‑listed site built in 1892 as the area’s original water supply, it was later upgraded several times before shifting to a recreational destination. You can follow lakeside trails, swim in the reservoir, or enjoy a picnic in the surrounding reserve. The water and catchment now support a mix of outdoor activities, while the historic concrete gravity dam still stands as a striking feature in the landscape.
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Manly Dam Reserve is an easy escape into bushland on Sydney’s Northern Beaches. You can walk the 7.3 km circuit for lake views, wildflowers, and eucalypt forest, or head straight to the water for a swim or paddle. This area forms part of the traditional lands of the Gayamaygal and Garigal peoples, with Aboriginal heritage sites adding depth and history to the landscape. Birdlife is active all day, and you might spot a swamp wallaby if you stay into the late afternoon.
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Bilarong Reserve spans roughly 5.3 hectares of riparian bushland and forms part of a corridor connecting the Deep Creek and Middle Creek reserves. The area is rich in birdlife, with black swans that are often spotted feeding on seagrass in the shallows, while waders and woodland birds thrive in the wetlands and forest edges. The Narrabeen Lagoon Trail passes directly through the reserve, making it a natural stopping point for walkers and cyclists. The playgrounds and picnic areas are great for families, and nature enthusiasts can enjoy birdwatching and quiet moments by the water. As a designated Wildlife Protection Area, dogs must be on lead to protect the reserve's diverse ecosystems.
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Narrabeen Lagoon, also known as Narrabeen Lake, is one of the Northern Beaches’ most treasured natural assets. Surrounded by suburban Sydney, it provides a pocket of wilderness where visitors can enjoy bushwalking, kayaking, paddleboarding, cycling, or relaxing by the water. The lagoon is a haven for wildlife, with diverse birdlife and thriving aquatic ecosystems. It’s also a cultural and recreational hub, with playgrounds, boating facilities, and picnic areas, making it a favourite spot for both locals and visitors.
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Narrabeen Lagoon Trail is a scenic multi-use path that loops around Narrabeen Lagoon on Sydney’s Northern Beaches, connecting wetlands, bushland, and lakeside suburbs. The mostly flat, well-maintained track is a mix of sealed cycleways, gravel sections, and timber boardwalks, making it popular for walking, running, and cycling. Along the way, there are several viewpoints, picnic spots, and birdlife, making it an ideal route for both short outings and the full loop.
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This is a great place to take a breather and just relax. It's the perfect way to get mentally and physically ready for the climb ahead!
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Nice loop through National Park. Best done anti-clockwise to reduce the time with traffic on McCarrs Creek Road
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The mountain bike trails in and around North Harbour Aquatic Reserve offer a mix of coastal paths, parkland trails, and moderate hills. You'll encounter varied elevations, from near sea level to more challenging ascents, providing diverse riding experiences. The routes often feature a combination of paved sections, fire trails, and some singletrack.
Yes, there are several easy routes available. For instance, the Mountainbike loop from Sydney Harbour National Park is an easy 6.3-mile (10.1 km) path that offers a gentle ride through parkland with scenic harbour vistas, perfect for those new to mountain biking or looking for a relaxed outing.
For experienced riders seeking a challenge, routes like the Akuna Bay Marina – Manly Wharf loop from Manly provide a more demanding experience. This difficult 43.6-mile (70.2 km) trail leads through diverse coastal and bushland landscapes, typically taking around 4 hours 30 minutes to complete. Another difficult option is the Easy Trail loop from Manly Warringah War Memorial State Park, which is 27.8 miles (44.8 km) long.
While the North Harbour Aquatic Reserve itself is primarily a marine protected area, the surrounding parklands and coastal paths offer options suitable for families. Easy routes, such as the Mountainbike loop from Sydney Harbour National Park, are generally well-suited for family rides, providing gentle gradients and scenic views.
Regulations regarding dogs on trails can vary within different sections of the reserve and surrounding parklands. It's advisable to check local signage and council websites for specific rules on dog access, especially in protected areas or national parks, to ensure compliance.
The trails often provide scenic overlooks with panoramic vistas across Sydney Harbour, including views towards North Head and Dobroyd Head. You'll also experience diverse habitats such as rocky shores, sandy beaches, and nearshore reefs, which are part of the marine reserve's rich environment. The Mermaid Pool – Bantry Bay Engraving Site loop from Manly offers varied terrain and coastal views.
Sydney generally enjoys a mild climate, making mountain biking enjoyable for much of the year. Spring and autumn offer pleasant temperatures, ideal for longer rides. Summer can be warm, so early morning or late afternoon rides are recommended. Winter is typically mild and can also be a good time to explore the trails.
Yes, many of the routes are designed as loops, allowing you to start and finish at the same point. Examples include the popular Mermaid Pool – Bantry Bay Engraving Site loop from Manly and the Mountainbike loop from Sydney Harbour National Park, both offering circular routes through scenic landscapes.
Parking availability varies depending on the specific starting point of your chosen trail. Areas around Manly, Sydney Harbour National Park, and other coastal access points typically have public parking facilities. It's recommended to check specific parking options for your chosen route beforehand, especially during peak times.
The North Harbour Aquatic Reserve area, particularly around Manly, is well-served by public transport, including ferries and buses from Sydney's city centre. Many trailheads are within reasonable distance of public transport stops, making it feasible to access routes without a car. Check local transport schedules for the most convenient options.
The routes in North Harbour Aquatic Reserve are highly rated by the komoot community, with an average score of 4.4 stars from over 6 reviews. Mountain bikers often praise the diverse coastal paths, scenic harbour views, and the variety of terrain suitable for different skill levels.
Given the proximity to Manly and other populated areas around Sydney Harbour, you'll find numerous cafes, restaurants, and public facilities within easy reach of many trailheads. Manly Wharf, for example, is a hub for amenities and is a common starting or ending point for several routes, including the Akuna Bay Marina – Manly Wharf loop from Manly.


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