Roaring Mountain, Yellowstone National Park, September 2024 — A soft rock (solfatera) mountain with many fumaroles (steam vents). This mountain side has been an attraction since the early days of the park. Apparently it was much more active in the early days, and you could actaully hear the roar, but it still puts on a show when the temperatures are cool. The fumaroles are the hottest thermal features of the park, as superheated water flashes to live steam as it emerges and not just hot mist. Sony a6700 with the Tamron 50-400 Di iii VC zoom at 75mm equivalent, and the Sony a5100 with Sony E 10-18 f4 at 27mm equivalent. a6700, Program mode. a5100, Superior Auto with Landscape scene mode selection. Processed in Photomator.