This 5¢ U.S. postage stamp, issued in 1964, honors John Muir, the renowned naturalist and founder of the Sierra Club. The stamp features a large engraved portrait of Muir set against towering redwoods, symbolizing his devotion to wilderness preservation. A smaller figure of Muir with a walking stick stands among the trees, emphasizing his role as an explorer and advocate for national parks. The word “CONSERVATIONIST” runs vertically, celebrating his environmental legacy. A classic collectible for those interested in American conservation history and philatelic tributes to nature.