McKinnon (also spelled Mckinnon and Mackinnon) was the first guide to take walkers from Lake Te Anau to Milford Sound. McKinnon began by guiding tours himself and expanded with a marketing campaign from there. Many parts of the Milford Track are named for McKinnon, including Mackinnon Pass, the highest point of the track (although the spelling is slightly different). He also cooked pompolona, a type of scone from which one of the guided trip huts takes its name.