arrow peak falls under the grenadier range of san juan mountains. given its rocky face, arrow peak, like other peaks of the grenadier range, offers one of the best mountaineering adventures in colorado. history has it that the first americans to scale arrow peak were william cooper and john hubbard in 1908, which was followed by a second ascent in 1932 by carleton long and john nelson via a more arduous route called the greystone-arrow saddle.