Old Faithful in Yellowstone National Park, Wyoming, is a legendary hydrothermal geyser celebrated for its remarkable regularity, dramatic eruptions, and stunning backcountry setting.
Old Faithful has been erupting roughly every 44 to 125 minutes for as long as records exist, making it one of the most predictable large geysers on earth. European-American explorers first documented it during the 1870 Washburn Expedition, and its reputation for consistency helped inspire the movement to protect the region, which became the world's first national park in 1872.
The geyser sits within Yellowstone National Park, a vast volcanic landscape where a supervolcano hotspot drives extraordinary geothermal activity. The Upper Geyser Basin around Old Faithful contains the densest concentration of geysers on the planet. Rangers lead free walks and talks throughout the day, and guided tours of the wider park offer deeper context on the geology and wildlife.
The surrounding area draws bison, elk, and the occasional wolf, so keep your eyes on the meadows as you move between thermal features. Nearby, West Thumb Geyser Basin offers a compelling side trip where hot springs bubble at the edge of a mountain lake.
Old Faithful endures as a symbol of the wild, unpredictable power hidden just beneath the surface of the American West, and a visit here leaves a lasting impression on every traveler who witnesses it.
Visit early in the morning to catch an eruption with far fewer crowds and softer light ideal for photography.
Check the predicted eruption times posted at the visitor center so you can time your walk around the Upper Geyser Basin between shows.
Bring layers even in summer, as mornings near the geyser field can be surprisingly cool and windy.
Walk the full Upper Geyser Basin boardwalk loop to visit Castle, Riverside, and Grand Geysers, all within a mile or two of Old Faithful.
Book lodging at the Old Faithful Inn well in advance; rooms fill months ahead during peak summer season.
See geyser basins, Old Faithful, and canyon falls in one day
A private day of Yellowstone hikes, thermal features and wildlife viewing
Choose your Yellowstone route with a local guide, lunch, and private transportation