The Kattamordo Heritage Trail is part of a larger Heritage Trail Network developed by the Western Australian Heritage Committee in commemoration of the 1988 Bicentenary. The original Heritage Council of Western Australia pamphlet on the trail (kindly provided by walkgps.com.au) states that the purpose of such trails was to "enhance awareness and enjoyment of Western Australia's natural and cultural heritage". I think it worked, I did enjoy hiking the trail and I think my awareness has been enhanced. I hope you enjoy the hike as well.
The pamphlet refers to an error in developing the trail. The word "Kattamordo" is the indigenous Noongar word for the Darling Range. Unfortunately, there was a bit of a typo when the signs and trail markers were made, so they read "Kattamorda" (notice the "a" at the end, not the correct "o"). Mistakes happen. I will refer to the correct "Kattamordo" name from now on (there is another error in the pamphlet as well, the trail is 34km long, not 27km, I think GPS tracking technology has improved significantly since 1988).
The Kattamordo Heritage Trail map provided above is good enough to get from Mundaring to Bickley Brook in one piece, without getting too lost (obviously use some common sense and do not completely trust the accuracy of GPS technology), but it may not be the true or original Kattamordo trail (it is very close though). Please remember that this trail is now over 30 years old and has not been maintained. You will need to keep an eye out for the trail markers as they are well worn and are often higher than your regular trail marker (I guess the trees have grown substantially, taking the markers up with them). Luckily, much of the trail is shared with more well-maintained trails such as the Bibbulmun Track, KEP Track, Munda Biddi and other shorter trails marked by the City of Kalamunda.
Ok, that's enough of the formalities. Let me explain what the hike is like and what you will find along the way. I will start at Mundaring, but the walk from Bickley Brook is also an option.