Imperial Geyser
Bright blue geothermal pool with mineral rims and steam, beside a pine forest and grassy trail in Yellowstone National Park.
Steam rises from mineral-colored geothermal pools along a forested stream with a dirt trail and a hiker on the right, in Yellowstone National Park.
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Imperial Geyser

Natural Attr★★★★★
Last Updated: January 2026

Overview

About This Attraction

Colorful microbial mats line the runoff around a pool of mineral-rich water; Imperial Geyser erupts from a 75-by-100-foot basin. The plume is driven by Yellowstone's active hydrothermal system, powered by heat from a deep magma chamber. Eruptions reach up to 80 feet in historic swings, with recent activity closer to 15 feet.

Best Time to Visit

The Fairy Falls extension is open from the Friday before Memorial Day through the end of September. Morning light enhances color; July and August are the busiest months—arrive early to beat crowds.

Visitor Tips

  • Arrive before 7am to secure parking; the Fairy Falls lot fills quickly
  • Park at Fairy Falls Trailhead; expect limited space and overflow
  • Stay on the trail; no viewing deck at Imperial Geyser
  • Bring water, sun protection, and insect repellent; be prepared for variable weather
  • Bear spray is recommended and know how to use it
  • Footing is uneven; wear sturdy boots and watch for roots and mud
  • Cell service is spotty; carry a satellite device for emergencies
ℹ️ Data Sources

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