Thornleigh to Marsfield

Download & Print Map and Notes

2 hrs 30 mins

6.1 km One way

106 m

Hard track
Following the Great North Walk, and the upper reaches of the Lane Cove River South, this walk explores dense bushland surrounding the river. You will experience a variety of trails along this walk, from steep bush tracks to wide biketrails. The common feature, however, is how well managed these trails are. The section just south of Thornleigh is the highlight of the walk as the bushtrail winds its way around the hill.

Maps for the Thornleigh to Marsfield walk

You can download the PDF for this walk to print a map.
These maps below cover the walk and the wider area around the walk, they are worth carrying for safety reasons.
Hornsby 1:25 000 Map Series 91304S HORNSBY NSW-91304S
Parramatta River 1:25 000 Map Series 91303N PARRAMATTA RIVER NSW-91303N
Sydney 1:100 000 Map Series 9130 SYDNEY 9130

Cross sectional view of the Thornleigh to Marsfield bushwalking track

Analysis and summary of the altitude variation on the Thornleigh to Marsfield

Overview of this walks grade – based on the AS 2156.1 – 2001

Under this standard, a walk is graded based on the most difficult section of the walk.

Length 6.1 km
Time 2 hrs 30 mins

Grade 4/6

Hard track
AS 2156.1 Gradient Very steep (4/6)
Quality of track Formed track, with some branches and other obstacles (3/6)
Signs Directional signs along the way (3/6)
Experience Required Some bushwalking experience recommended (3/6)
Weather Storms may impact on navigation and safety (3/6)
Infrastructure Limited facilities, not all cliffs are fenced (3/6)

Some more details of this walks Grading

Here is a bit more details explaining grading looking at sections of the walk


3.5km of this walk has gentle hills with occasional steps and another 1.3km has short steep hills. Whilst another 1.1km is flat with no steps and the remaining 230m is very steep.

Quality of track

3.5km of this walk follows a clear and well formed track or trail and another 1.7km follows a smooth and hardened path. The remaining (860m) follows a formed track, with some branches and other obstacles.


Around 5km of this walk is clearly signposted, whilst the remaining 660m has directional signs at most intersection.

Experience Required

Around 3.6km of this walk requires no previous bushwalking experience, whilst the remaining 2.5km requires some bushwalking experience.


Around 3.5km of this walk is not usually affected by severe weather events (that would unexpectedly impact safety and navigation), whilst the remaining 2.5km is affected by storms that may impact your navigation and safety.


Around 3.4km of this walk is close to useful facilities (such as fenced cliffs and seats), whilst the remaining 2.7km has limited facilities (such as not all cliffs fenced).

Similar walks

A list of walks that share part of the track with the Thornleigh to Marsfield walk.

Other Nearby walks

A list of walks that start near the Thornleigh to Marsfield walk.

Plan your trip to and from the walk here

The Thornleigh to Marsfield walk starts at the Thornleigh Train Station (gps: -33.731948, 151.07815)
Your transport options to Thornleigh Train Station are by;
Train. (get details)
Bus. (get details)
Car. There is free parking available.
(get details)

The Thornleigh to Marsfield ends at the End of Vimiera Rd (gps: -33.764966, 151.10605)
Your transport options to End of Vimiera Rd are by;
Bus. (get details)
Car. There is free parking available.
(get details)

Fire Danger

Each park may have its own fire ban, this rating is only valid for today and is based on information from the RFS Please check the RFS Website for more information.

Weather Forest

This walk starts in the Metropolitan weather district always check the formal BOM forecast or pdf before starting your walk.

Forecast snapshot

Park Information & Alerts



Short URL =

Gallery images
There are other downloads I am still working on.
You will probably need to login to access these — still all free.
* KML (google earth file)
* GPX (GPS file)

Special Maps/ brochures
* A3 topo maps
* PDF with Lands Topo map base
* PDF with arial image (and map overlay)
I wanted to get the main site live first, this extra stuff will come in time.
Happy walking
Matt 🙂