 The glacier is named for Lyman B. Sperry, a professor from Oberlin College, who in 1895 participated in an expedition to explore the geography and map the region where the glacier is located.Like all other glaciers in the park, Sperry has significantly retreated, though it leaves many minor glacial features, including large moraines and streams and lakes colored a milky aqua from glacial flour.Unlike the more famous Grinnell Glacier, Sperry Glacier is high above the lakes it feeds, so no icebergs form.