Diadem Peak (11,060') sits at the north end of the head of the Woolley Creek drainage just north of the Columbia Icefield. It shares this area with neighboring peaks Mount Woolley and Mount Cromwell. Two Main routes to the summit of Diadem Peak are accessed from this side of the mountain, the South Ridge (II) and the South East Face (II) each of which are moderate climbs. Another route, accessed from the north side of the mountain and much more difficult, is the North Face, Humble Horse (IV, 5.7 WI4).
The route starts (and ends) with a ford of the Sunwapta River.