A bit of a mish-mash this one. The management firetrails are nice, as is the single track by Mona Vale road, but none of the trails here are really long enough to make a flowing ride, and it's broken up by the sealed road around the Wildflower Garden itself.

That said, if you don't want something too long then why not?

A couple of these trails are part of the Harbour to Hawkesbury Walking Track, and there are other walking trails around here (notably Mueller Track). Sadly the Mueller Track is not only closed to bikes, but it would also seem impassable at the Eastern end (lots of steep steps) so don't bother with this.

Also watch out to the West, there's some steep stuff here, especially the climb up to Phillip Road - although that is very do-able, mostly thanks to a small sealed section to give much needed traction.

Of course any/all of this could make a nice addition to a lap of Cascades - which is just the other side of Mona Vale Road.