Via the Cascade Saddle track.

From the top of the Cascade Saddle track, which is marked by a tripod pylon, head south along the ridge towards the low peak of Tyndall, until a suitable line across the Isobel Glacier is reached. Alternatively cross the upper basin of Cascade Creek to reach the easy angled North Ridge. The top fifty metres of rather loose rock are interesting climbing—brush up on the art of climbing choss. Ansted is a long climb from Aspiring Hut, especially as it is commonly combined with an ascent of Tyndall. The climb to the top of the saddle takes about 4 hours, with a further 3 to 4 hours to reach the top of Mt Ansted.