Imperial Geyser
Imperial Geyser glows with turquoise water and steam in a Yellowstone National Park landscape.
Imperial Geyser in Yellowstone National Park steams above a mineral-rich pool with a forested backdrop and blue sky.
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Imperial Geyser

Natural Attrβ˜…β˜…β˜…β˜…β˜…
Last Updated: January 2026

Type

Thermal Feature

Accessibility

Moderate hike; uneven terrain; not wheelchair accessible

Best Season

Late May–September; early morning visits reduce crowding and glare

Busiest Season

July and August

Features

Fountain geyser; silica-lined conduits; colorful microbial mats along runoff; 75-by-100-foot pool

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.

Quick Facts

Type

Thermal Feature

Access

Moderate hike; uneven terrain; not wheelchair accessible

Main Features

Fountain geyser; silica-lined conduits; colorful microbial mats along runoff; 75-by-100-foot pool

What You'll See

A plume erupting from a 75Γ—100 ft pool; mineral-rich runoff supports vivid microbial mats along the channels; you view from the trail with no designated deck

What Makes It Special

Historically active geyser in Lower Geyser Basin; notable for vibrant runoff mats and silica deposits; eruption history includes up to 80 ft heights

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 monthsβ€”arrive early to beat crowds.

Safety Considerations

Thermal hazards: stay on the trail; ground around geothermal features is thin and unstable. Gravity on some access routes; wildlife encounters riskβ€”keep 100 yards from bears, 25 yards from other animals; bear spray recommended

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
πŸ“– 51centadventures.com πŸ“– 10adventures.com πŸ“– volcanic-springs.com πŸ“– nps.gov πŸ“– npshistory.com πŸ“– usgs.gov πŸ“– yellowstonepark.com πŸ“– blogspot.com πŸ“– freeroaminghiker.com πŸ“– gaiagps.com πŸ“– americansouthwest.net πŸ“– hikingproject.com πŸ“– nationalparkstraveler.org πŸ“– youtube.com πŸ“– reddit.com πŸ“– yellowstone.org πŸ“– yellowstonenationalparklodges.com πŸ“– wanderlog.com πŸ“– wikipedia.org πŸ“– yellowstonedayhikes.com πŸ“– grizzlyrv.com ⭐ Google Reviews 🏞️ National Park Service πŸ“ YourNPGuide Editorial

Information is compiled from official sources, verified traveler reviews, and editorial research. Learn how YourNPGuide works β†’