Sugarloaf/Rockburn Track

Sugarloaf/Rockburn is a 16.9 km (10.5 mile) one-way traverse from Routeburn Shelter car park to Sylvan Campsite. Allow 8–11 hours for the full walk. It combines a short Routeburn Track approach, the climb over Sugarloaf Saddle, the descent through the Rockburn valley, and the marked Lake Sylvan Track connection to the campsite. The stored line includes those track approaches; it is not a loop, and the separate road connection between the two trailheads is not part of the distance.

Leave a car at both ends or arrange a shuttle before setting out. If you need to walk back between the trailheads to reach your car, allow another 3.8 km and about 50 minutes on the road. Turning around at the saddle or making a shorter walk from either end changes the experience substantially; the full point-to-point route is a demanding day out.

From Routeburn Shelter, follow the Routeburn Track. About 15 minutes in, take the signed left turn for Sugarloaf Track. The climb rises steadily through beech forest, where roots and frequent small streams slow progress. Above the bushline, the route reaches a grassy saddle that can be boggy. The open ground is fragile, so stay on the marked line. The payoff is a wide look into both the Rockburn and Routeburn valleys, a striking change after the enclosed forest approach.

The trail drops from the saddle into the Rockburn valley, with a steep, rough descent and more stream crossings before the grade eases along the river. The Rockburn shelter sits in the beech forest near a narrow chasm, river beaches and pools. Follow the signs at the shelter area toward the Sylvan Track; the valley-side terrain and repeated crossings can make this part slower than its gentler grade suggests. The route then leaves the river corridor and works back toward the lake basin.

The final marked connection follows the Lake Sylvan Track to Sylvan Campsite, through moraine and tall beech forest. This access leg is included so the point-to-point route finishes at a clear parking place. The separate Lake Sylvan return loop is a different walk and is not included in 16.9 km. The campsite is the finish, not a return to the Routeburn car park.

DOC classifies the route as an advanced tramping track. The long climb, steep descent, rooty tread, fragile sometimes-boggy saddle and many small stream crossings call for sure footing and enough daylight for a full day. Dogs are not allowed. This is a poor choice for a quick viewpoint outing; if you only want the saddle view, use the Routeburn end and turn back by the same route, while treating the climb as a serious hike.