Proceeding clockwise, this easy-to-follow loop trail starts at the old Marrinup town site, which was destroyed by bushfire in 1961. The 7.9 kilometre Top Trail has a single track suitable for both the novice and experienced rider. The trail can be shortened to about four kilometres by using the short course return route. It varies from narrow, challenging tracks with flat sections and hill climbs to true gravel roads, with the ball-bearing-like bauxite gravel making things pretty interesting for mountain biking.
During World War II, thousands of Italian and German POWs spent time here cutting wood for Perth before being billeted out to Western Australian farms. Buildings no longer exist, but there are foundations, gardens and some fencing and it's fascinating to stroll around the camp trying to imagine what life would've been like for the POWs.
Tourists are advised to check for alerts and road/park closures before commencing their travel on www.emergency.wa.gov.au and https://alerts.dbca.wa.gov.au