[3] O'Malley Peak is situated in Chugach State Park, 12 mi (19 km) southeast of downtown Anchorage, 2.3 mi (4 km) west of Mount Williwaw, and 1.45 mi (2 km) northwest of The Ramp, which is its nearest higher peak.

Access is via the Powerline Trail with several scramble routes to the summit.

"Doc" O'Malley moved to Anchorage in 1946 and practiced medicine there until his death in 1974.

[4] Based on the Köppen climate classification, O'Malley Peak is located in a subarctic climate zone with long, cold, snowy winters, and mild summers.

[5] Weather systems coming off the Gulf of Alaska are forced upwards by the Chugach Mountains (orographic lift), causing heavy precipitation in the form of rain and snow.