Key Summit - At the Howden Hut I dropped my pack for a side trip to Key Summit from the Routeburn Track. At the summit is a guided walk (often on boardwalk) through a high mountain wetland. It offered some of the most spectacular flora I saw while in New Zealand. Afterwards, most trampers continue to the Divide to end their Routeburn adventure, rather I chose to continue on the Greenstone to make my adventure into a loop.