DOC rates the Edwards–Otehake route Expert and allows two to three days overall. From Edwards Hut, the approach to Otehake takes about five to six hours, crossing the river repeatedly, going over Taruahuna Pass, then dropping through rocky terraces and bush. Continuing downstream toward Lake Kaurapataka is another seven to nine hours to the lake-track junction over steep, slow, partly unmarked ground, with no hut or shelter beyond Otehake. River crossings can become unsafe after rain, and winter travel brings avalanche hazards. DOC says this route is for well-equipped, experienced trampers who can judge river and weather conditions.
Bunks are first come, first served, with no booking; bring hut tickets or a Backcountry Hut Pass. The hut has mattresses, heating, an open fire and a pit toilet. Water is from a nearby natural source, so plan to treat it rather than count on a tap.