09/02/2026
Lone Star Geyser 🌋 — one of Yellowstone’s coolest geysers that’s a little more off the beaten path. The geyser erupts roughly every 3 hours, shooting water up to 45 feet into the air, and the entire eruption sequence can last around 20 minutes. To see it, park at the Lone Star Geyser Trailhead just south of Old Faithful near Kepler Cascades, then hike about 4.8 miles round trip along the Firehole River. The trail is relatively flat and easy, but you’ll want to give yourself plenty of time to catch an eruption since the timing isn’t exact. Pro tip: check the eruption log near the geyser for recent eruption times and plan your hike around the next one. 🏔️
Video credit: Quinn Kunz