Allen Mountain, a 4,340-foot summit in New York's Adirondacks, is the twenty-sixth-highest of the Adirondack High Peaks and is known as one of the region's more remote peaks. Located in the town of Keene, it received its name in 1869 when Rev. Joseph Twichell named it for his friend Rev. William B. Allen during a visit to the Adirondacks. Its earliest recorded ascent came on August 21, 1921, when Bob Marshall, George Marshall, and Herbert Clark climbed it. Today the usual approach begins near Tahawus and follows the Hanging Spear Falls Trail before turning onto an unmarked herd path to the summit.