Three main summits comprise the Mount Cayley massif. The highest and northernmost is Mount Cayley with an elevation of . Its northeastern flank abuts the southern end of the Powder Mountain Icefield. This is a long and wide irregularly-shaped glacier that trends slightly to the northwest. Just southwest of Mount Cayley lies Pyroclastic Peak, in elevation. It contains a jagged summit ridge of many slender rock pinnacles, the largest of which is known as the Vulcan's Thumb. Wizard Peak with an elevation of is east of Pyroclastic Peak and is the lowest of the three main summits.