Castle Peak is a 10,190-foot (3110 meter) mountain summit located in the Wrangell Mountains, in the U.S. state of Alaska. The peak is situated in Wrangell-St. Elias National Park and Preserve, northwest of McCarthy, and south of Mount Blackburn on the south margin of the Kuskulana Glacier valley. Precipitation runoff from the mountain drains into Kuskulana River and Lakina River which are both tributaries of the Chitina River. The peak's descriptive name was used by early prospectors as reported in 1901 by the US Geological Survey.