Lake Howden. From here the track branches off towards the Greenstone and Caples Tracks which create a semi-circuit back towards Glenorchy, the Routeburn continuing past Key Summit to The Divide road end and the end of the track. New Zealand Mountain Safety Council's video on the Routeburn Track Side trips Various side trips can be found off the main route that are available between both ends of the Routeburn Track, and some trampers incorporate these into a full crossing while others use the main track as an access point to explore the various options available. Starting from the Routeburn Shelter and ending at the Divide some of the side trips available are: Nature walk A short loop track to the left of the main trail with much signage mainly made for day walkers from the Routeburn Shelter end. Rockburn Track and Sugarloaf Track An advanced tramping track to the right of the trail that links back toward the Lake Sylvan walk and Sylvan campsite as well as the Route Burn North Branch. Forge Flat A small rest point in sand next to the Routeburn River. Route Burn North Brach An advanced multi-day tramping track accessed over the river from Routeburn Flats Hut; this route links with Rockburn Track and Sugarloaf Track. Emily Pass An unmarked advanced tramping route which via Emily Pass allows access back down to Lake Mackenzie or via Fraser Creek access into the Caples Track. Lake Wilson Just before the Harris Saddle Shelter and after Lake Harris to the right is an unmarked advanced tramping route which leads to Lake Wilson. Conical Hill From the Harris Shelter a steep route takes you to the top of Conical Hill and is the highest marked trail on the Routeburn Track, a wide vista can be seen from the top. Deadmans Track Another advanced tramping track on the right just after the Harris Shelter but this time marked leads down to the Hollyford Road. Lake Mackenzie Campsite and Split Rock To the left of Mackenzie Hut a track beside the lake leads to the Lake Mackenzie campsite first and Split Rock second which is a large rock with a split large enough to walk through. Howden Campsite and Greenstone and Caples Tracks The track to the left of Lake Howden leads initially to the Howden Campsite and later to the Greenstone and Caples Tracks. Pass Creek Track A marked track