Natural AttractionFort Yellowstone Overlook
Travertine terraces from Mammoth Hot Springs; calcium carbonate deposition in action.

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.
Thermal Feature
Moderate hike; uneven terrain; not wheelchair accessible
Fountain geyser; silica-lined conduits; colorful microbial mats along runoff; 75-by-100-foot pool
A plume erupting from a 75Γ100 ft pool; mineral-rich runoff supports vivid microbial mats along the channels; you view from the trail with no designated deck
Historically active geyser in Lower Geyser Basin; notable for vibrant runoff mats and silica deposits; eruption history includes up to 80 ft heights
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 monthsβarrive early to beat crowds.
Thermal hazards: stay on the trail; ground around geothermal features is thin and unstable. Gravity on some access routes; wildlife encounters riskβkeep 100 yards from bears, 25 yards from other animals; bear spray recommended
Historically active geyser in Lower Geyser Basin; notable for vibrant runoff mats and silica deposits; eruption history includes up to 80 ft heights
Visible hydrothermal plumbing: active geyser dynamics, silica deposition, and colorful microbial mats along runoff
From Grand Loop Road, park at the Fairy Falls Trailhead (very limited parking). Follow the Fairy Falls Trail to Imperial Geyser extension for a 6.4-mile round-trip hike.
Fairy Falls Trailhead
Fairy Falls Trail extension to Imperial Geyser
Along the Fairy Falls Trail corridor where runoff channels frame the geyser plume
Golden-hour plume; close-ups of microbial mats; steam silhouetted against mineral crust
Golden-hour plume; microbial mats along runoff; vantage points along the trail
Bison, elk, and deer frequently along the trail; bears present in the area
Bug activity in late spring/early summer; potential afternoon thunderstorms; variable conditions in the basin
Fairy Falls, Midway Geyser Basin, Grand Prismatic Spring, Fairy Creek Trail
Fairy Falls Trailhead facilities; no potable water along the route
Moderate trail; uneven terrain; not wheelchair accessible
Stay with children; thermal ground is unstable; hold hands; bear awareness
Fairy Falls Trailhead vault toilets; no potable water along the route
To Park Entrance
6.4 miles round-trip from Fairy Falls Trailhead
Based on 30 Google reviews
Based on 30 guest reviews
" 5-star rating from 30 reviews; visitors praise the backcountry setting, geyser dynamics, and vivid runoff textures, with cautions about parking and terrain"
Paul
This geyser is only another 15 minutes past Fairy Falls and totally worth it! You get to be really close up to a very active geyser and the stream that it forms. Also, if tou hike up the ridge behind the geyser you'll find an alpine lake and fantastic views of the areas that you just hiked through to get there!
Andy Smith
While quite a walk from the carpark, Imperial Geyser is well worth the hike. It was highly active when I was there and one of the few you can get close to safely. Itβs a stunning geyser with an array of colours. You can also walk up the hill behind it and get some fantastic pictures. Along the way here, you get to see Grand Prismatic from a different angle and Fairy Falls. Itβs the same path to start as the Grand Prismatic Overlook, so you can pass through this on the way there and back to see if the view is better. I would definitely recommend spending some time doing this. One thing to remember its quite remote. Bring lots of water.
Whitney Leach
We hiked to Imperial Geyser after Fairy Falls, and it did not disappoint. It was really active when we were there, and we even stopped to have a snack nearby. The geyser went off a few times while we were watching, and it was absolutely beautiful. If you have time on your next trip, this is definitely the part of the basin Iβd recommend visiting - it feels a bit like a hidden gem!
Showing 3 of 30 reviews
Yes. The Fairy Falls lot is limited and fills early in peak season; arriving early minimizes parking risk and crowds.
Yes. The extended hike delivers a classic geyser scene, mineral runoff textures, and a sense of Yellowstoneβs backcountry scale.
No. Dogs arenβt allowed on the Fairy Falls/Imperial Geyser trail or on most Yellowstone trails; keep them in developed areas and parking lots.
Itβs a moderate path with uneven terrain and roots; assess mobility and comfort with long distances; thereβs no wheelchair access.
Water color varies with light and mineral content; youβll see clear water with mineral staining and vivid mats along the runoff, not a guaranteed photographic blue.
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