The Adirondack Forty-Sixers are an organization of hikers who have climbed all forty-six of the traditionally recognized High Peaks of the Adirondack Mountains. They are often referred to just as 46ers. As of 2024, there were over 16,000 registered forty-sixers. The organization primarily supports efforts to maintain the Adirondack High Peaks Wilderness, and encourages aspiring members through a correspondents program.