Haystack Butte is a 7,486-foot-elevation (2,282-meter) summit located in the Lewis Range, of Glacier National Park in the U.S. state of Montana.

It is situated one mile west of the Continental Divide, in Flathead County, above the Weeping Wall on its south slope.

Topographic relief is significant as the west aspect rises 3,900 feet (1,200 meters) above McDonald Creek in less than 1.5 mile.

This geographical feature's descriptive name was on maps as early as 1904, and was officially adopted March 6, 1929, by the United States Board on Geographic Names[3] Based on the Köppen climate classification, Haystack Butte is located in an alpine subarctic climate zone with long, cold, snowy winters, and cool to warm summers.

Like other mountains in Glacier National Park, Haystack Butte Tail is composed of sedimentary rock laid down during the Precambrian to Jurassic periods.