Boulder Peak is a 10,981-foot elevation (3,347 m) mountain summit located in Blaine County, Idaho, United States.

[1] Precipitation runoff from the mountain's slopes drains to the Big Wood River via Boulder Creek.

Topographic relief is significant as the summit rises 4,400 feet (1,300 meters) above Big Wood River in four miles.

This landform's toponym has been officially adopted by the United States Board on Geographic Names.

[3] Based on the Köppen climate classification, Boulder Peak is located in an alpine subarctic climate zone with long, cold, snowy winters, and cool to warm summers.