The Mount William Walkway is located on the southern flanks of the Bombay Hills, at the northern edge of the Waikato district. The walkway connects Puketutu Rd south of Bombay, and McMillan Rd, Mangatawhiri, with most of the walk being through open farmland. A short, but fairly steep, part of the track passes through regenerating native bush in the Mount William Scenic Reserve, between McMillan Rd and Mt William trig station. Since the walkway passes through sheep farms it may be closed during the lambing season between August 1 and October 1, and dogs are not permitted at any time.
The walkway also gives access to Puketutu trig, on a peak which at 376 metres is slightly higher than Mt William at 373 metres. Puketutu peak is a few metres higher, at 379 metres. There are car parking areas both at the end of Puketutu Rd and the end of McMillan Rd, and toilets about 10 minutes walk from McMillan Rd where the track enters the Mount William Scenic Reserve. Information about the walkway can be found on the DoC web site.