The Cascade Glacier may be best reached from Onslow Hut by crossing the stream draining the Onslow Glacier and then climbing north towards Pt 2195m. Before that point is reached, drop down a steep gut onto the glacier.
The Murchison lake makes direct access to Cascade Stream difficult, but once in the stream it is straightforward to access the lower glacier, bypassing bluffs from 1500m to 1800m on the true right.
Ascend the Cascade Glacier up easy slopes to the pass. After crossing the broad expanse of the pass, descend either snow or, in late summer, rock, and scree to the Beetham valley.
From the Beetham Valley follow the stream up past the tributary from the main Beetham Glacier then turn up the next major gully descending from the Pass on the south side of a small ridge sticking out from the pass. Snowslopes or scree lead up under Aiguilles Rouges onto the extensive plateau of the pass. The descent onto the Cascade Glacier is straightforward. To reach the Murchison Glacier either ascend from the lower Cascade Glacier up 250m of gullies onto the lower East Ridge of Aiguilles Rouges or else sidle around down the side of the snout of the Cascade Glacier.
