The most recent edition of this event was on 2 December 2017.
The annual Kepler Challenge and shorter Luxmore Grunt is held on the 60 km Kepler Track circuit. Both events have a strict limit on numbers and sell out within minutes of online entries opening.
Starting at the Control Gates of Lake Te Anau the route follows an easy first 6km before it takes a steady climb to the Luxmore Hut. The next 12km offer wonderful views of the South Fiord along the undulating tops before a spectacular descent to the Iris Burn Hut. A gradual 17km journey down the Iris Burn brings competitors to the Moturau Hut on Lake Manapouri and from there a 6km run to the last checkpoint at Rainbow Reach. The home straight follows alongside the Waiau River and back to the Control Gates.
The concurrent Luxmore Grunt event follows the same route as far as the Luxmore Hut, then returns via the same route back to the Control Gates.