Hike at a Glance
Max elevation: 556m
Min elevation: 278m
Total Ascent: 312m
Hike overview
The Main Valley and Rockdale Hill Circuit offers a scenic adventure for experienced hikers in the Adelaide Hills. Located within Horsnell Gully Conservation Park, this 4.7km loop trail is rated as moderate difficulty (grade 4) and typically takes around 2 hours to complete.
The circuit combines various terrains, including single-track walking trails, fire tracks, and forested valleys. Be prepared for some steeper sections, particularly on the ascent from Main Valley to the fire tracks on Rockdale Hill. This part of the trail involves loose rocks and requires hikers to walk up a waterfall if following the clockwise direction. Conversely, those going counter-clockwise will descend the waterfall.
Throughout the hike, keep an eye out for majestic river red gums and blue gums lining the path. Look up into the treetops for a chance to spot koalas, and listen for the sounds of southern brown bandicoots foraging in the undergrowth. The fire track on Rockdale Hill, and the section leading up to it when going clockwise, offers a different experience compared to the rest of the trail.
For those interested in learning more about the area, 10 numbered posts marking sites of interest can be found near the car park. Information about these points can be accessed on the Friends of Black Hill and Morialta website.
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Content use
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Walk map and GPX file
Max elevation: 556 m
Min elevation: 278 m
Total climbing: 312 m
Total descent: -312 m
Getting there
Getting to the trailhead: Horsnell Gully Conservation Park.
Reaching the Horsnell Gully and Giles Conservation Park trailhead involves a bit of navigation. There are two access roads. Take Old Norton Summit Road and turn onto Horsnells Gully Road. Alternatively, travel from the top of The Parade onto Coach Road, followed by Bishop Street and Haven Road. Be aware that Haven Road is a steep, unsealed road.
Regardless of the chosen route, Horsnells Gully Road leads closest to the park entrance. While the road appears to end at a quarry entrance, look for a smaller road branching off to the right near the quarry gate. Marked by signs and a gate for Horsnell Gully Conservation Park, this road leads to a designated carpark. Remember, the park gate closes at sunset, so plan your hike accordingly.
Closest towns to this walk: Aldgate, Ashton, Auldana, Bridgewater, Crafers, Leawood Gardens, Norton Summit, Skye, Stirling, Summerton, Teringie, Upper Sturt
About the region
Take a bushwalk through the steep gullies in the picturesque Adelaide Hills to discover the history of Horsnell Gully and Giles Conservation Parks. Both the Heysen and Yurrebilla trails wind their way through these parks, offering stunning views of the surrounding region.
Named after the state Governor's coachmen, John Horsnell, relics and reminders of the Horsnell family property still remain. Along the signposted walking trails, you will find the remains of a large homestead, including the coaching sheds, stable and cowsheds. The original garden of the Horsnell property is located at the start of the walking trail, marked by elm trees, plum trees and orange trees.
There is an extensive network of trails within both parks, with two main hiking loops in Horsnell Gully Conservation Park.
Similar walks nearby
Looking for more walks in or near Horsnell Gully Conservation Park? Try these trails with a similar difficulty grade.
Track grade
Grade 4 (Hard) - Challenging Walks for Experienced Walkers: Grade 4 on the AWTGS signifies challenging walking tracks. Bushwalking experience is recommended for these tracks, which may be long, rough, and very steep. Directional signage may be limited, requiring a good sense of navigation. These walks are suited for experienced walkers who are comfortable with steeper inclines, rougher terrain, and potentially longer distances.
Explore safe
Plan ahead and hike safely! Carry enough water, pack layers for changing conditions, and bring safety gear like a torch, PLB, and reliable communication device. Check official sources for trail updates, closures, and access requirements, and review local weather and bushfire advice. Most importantly, share your plans with someone before you go. Being prepared makes for a safer and more enjoyable hike! Stay Safe, Explore More, and Always #ExploreSafe.
Packing checklists
What you carry in your pack depends on factors like weather, terrain, and your adventure type. Not sure what to bring? My free planning, food, and packing checklists are a great starting point, covering day hikes, overnight trips, and multi-day adventures. Use them to customise your kit and always prioritise safety.
Let someone know
Before heading out, take a moment to fill out your trip intentions form. It’s a quick way to share your hike details with family or friends. If something goes wrong, they can notify emergency services, ensuring a faster response and peace of mind. Stay safe and enjoy your adventure
Suggest an edit
Spotted a change on this trail? Maybe there are new features, the route has shifted, or the trail is permanently closed. Whatever the update, I’d love your input. Your feedback helps fellow hikers stay informed and ensures that our trail info stays fresh and reliable.
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.