Most of the rideable trails are in the Northern section of Lane Cove National Park (LCNP). Stretching from Macquarie Uni in the South, Thornleigh Park in the North, & Cheltenham rail station in the West.

North section LCNP

The trails in the North section range from rocky fire trails, sealed commuter cycle trails in the South, & roughly concreted steep sections in the NW.

Heading out from the start point of Vimiera Rd, head towards the M2 underpass, then down steep sealed commuter bike path to Lane Cove River, where you can join the Great North trail. From here you can head in a number of directions along a variety of firetrails.

Notes from a recent rider "There are some good hill climb training hills too. Mostly the trails follow the river. I rode up to where the trail ends at Ramsay Ave in Comenarra and then back tracked a bit to continue up another steep hill to finish at Browns Waterhole.

There were a few other trails off to the side, but I haven't checked them out yet, so can't comment on what they are like. "

Pennant Hills Park to West Pymble - 10km

Pennant Hills Park

A scenic ride that takes in the variety of vegetation types and offers great harbour and city views and nice spots to stop for picnics.
Follow the Lane Cove River from Pennant Hills Park (Hornsby Council Park) and take the management trail south downhill through to Devlins Creek in South Turramurra and Browns Water Hole through to Pymble. For a loop, travel back along the Comenarra Parkway. There are some tricky sections with steep areas but a good surface.

South section LCNP

The Southern section of LCNP between Delhi Road and Lane Cove Road has no trails that can be ridden by mountain bikes. There is tarmac riding though.

For the off-road bit, I rode from the north side of Lane Cove Road (across from Lady Game Drive intersection) and headed northwest up the Lane Cove River. It starts with a nice downhill with a few good sized water bars to jump on the way down. At the bottom of the first downhill is a creek crossing and a sign asking you to hike a bike. Unless you are able to jump up 1 metre rocks, you will need to walk the next uphill section anyway. This hike a bike section goes for about 400m.

After that you can ride again. The trail is smooth and flowing in places, rough and rocky in others and sandy in others.