Geysers of Yellowstone National Park (2025 Guide)

Yellowstone National Park is home to over 500 active geysers—more than half of all geysers on Earth. The park’s geothermal wonders are fueled by the Yellowstone Caldera, one of the world’s largest active volcanic systems. [NPS: About Geysers]

Must-See Geyser Basins & Features

• Old Faithful (Upper Geyser Basin): Erupts about every 90 minutes. Check eruption predictions at the NPS Old Faithful page or visitor centers.
• Grand Prismatic Spring (Midway Geyser Basin): The largest hot spring in the U.S., famous for its vibrant colors.
• Steamboat Geyser (Norris Geyser Basin): The world’s tallest active geyser, with unpredictable but spectacular eruptions.
• Other highlights: Castle Geyser, Morning Glory Pool, Fountain Paint Pot, Mammoth Hot Springs travertine terraces.

2025 Alerts & Closures

Important: Biscuit Basin is closed for 2025 due to a recent hydrothermal explosion. Check NPS Current Conditions for updates on closures and hazards.

Safety in Thermal Areas

• Always stay on boardwalks and marked trails—ground can be thin and water temperatures exceed 200°F (93°C).
• Never touch thermal features or throw objects into them.
• Supervise children closely at all times.
• Pets are not allowed on boardwalks or trails in thermal areas.

Tips for the Best Experience

• Visit early morning or late afternoon for fewer crowds and better light for photography.
• Check eruption predictions at visitor centers or the NPS Geyser Activity page.
• Bring water, sun protection, and be prepared for rapidly changing weather.

For more, see the official Yellowstone National Park website.