The four wheel driving at Harvey is great fun in the dry, and much more challenging in the wet. It is very similar to the Mundaring Powerlines Tracks and Dwellingup with many steep hill climbs and lots of mud in winter! The four wheel driving starts just out of Brunswick Junction. Much of the 4×4 can be done by a fairly stock car, with the harder bits and pieces being optional. In fact, if you wanted to camp in the area you could probably do it in a two wheel drive car (in the summer only!). There are some amazing places to stop and take photos, as well as a number of secluded camp sites for those who want a cheap weekend away with a bit of peace and quiet!
In saying this, there is a lot of difficult sections for the more advanced drivers and cars to play around on. Bob's hill is probably one of the hardest hill climbs in WA, and only the toughest vehicles get up!