This 4,400-foot High Peak obtained its name in 1869. Lumbermen Almon Thomas and Thomas Armstrong had acquired several of the high peaks three years earlier through purchase of a Totten and Crossfield tract. As Thomas stood on a hill, looking at their property, he pointed at a mountain and proclaimed, “I am going to name that mountain over there ‘Armstrong'” (Carson 145). While locals previously referred to the mountain as “Mountain Brook Hump,” the name Armstrong prevailed, though it did not appear in print for another fifteen years or so.
The first known ascent of Armstrong Mountain was recorded by Ed Phelps and Thomas P. Wickes in 1875. Located along the Great Range between Gothics and Upper Wolfjaw, Armstrong is rarely hiked alone. The northeastern side of the mountain, between Armstrong and Upper Wolfjaw, is especially steep. A particularly gnarly section of trail features a large wooden ladder that allows hikers to more safely descend a huge cliff.