Geyser — Not a Soaking Spring
Imperial Geyser, Spray Geyser is a geyser, not a traditional hot spring. These geothermal features can be extremely dangerous — boiling water, toxic gases, and unstable ground are common hazards. Do not attempt to soak.
File:Artemisia Geyser (32419629361).jpg — public domain
Imperial Geyser and Spray Geyser emerge at 192 degrees Fahrenheit at 7,327 feet elevation, located two miles from road access via hiking trail in Yellowstone's Midway Geyser Basin area. These closely associated thermal features exceed ambient air temperature by 156 degrees in terrain receiving 152 inches of annual snowfall. National Park Service maintains the site under permanent wilderness protection.
At 7,327 feet elevation in Gallatin County, these geysers occupy rolling lodgepole pine forest transitioning to thermal barren. The setting receives 29 inches of precipitation annually, with average annual air temperature of 36.1 degrees Fahrenheit creating harsh winters. Thermal features cluster in this portion of the Firehole River drainage, with mineral-rich runoff creating colorful deposits downstream. Dense forest surrounds the geyser complex, punctuated by steam columns visible from distance during cold weather.
History of Imperial Geyser, Spray Geyser
Imperial Geyser gained its name from impressive eruption characteristics, while Spray Geyser describes the dispersed nature of its discharge. These features appear in systematic geothermal surveys conducted throughout Yellowstone during the 1970s. The area remains undeveloped since park establishment in 1872, preserved as natural laboratory for geothermal research. Opal Pool, a related feature in Midway Geyser Basin, maintains temperature around 132 degrees Fahrenheit as fountain-type geyser.
Access requires two-mile hike from Fountain Flat Drive with moderate elevation gain. Visit June through September for optimal trail conditions and geyser visibility. Carry bear spray in this heavily forested country and maintain noise on trail. Stay on designated paths to protect fragile thermal features and avoid scalding water. Big Springs Group Area in Idaho offers reservable camping 30 kilometers away.
Is Imperial Geyser, Spray Geyser worth visiting?
Best for
- Observing powerful hot springs
- Overnight camping trips
- Winter soaking with dramatic temperature contrast
Imperial Geyser, Spray Geyser is well suited for observing powerful hot springs and overnight camping trips.
Annual Precip: 29.5 in
Annual Snow: 151.6 in
December
Air 15°F · Water 192°F · +177° contrast
January
Air 17°F · Water 192°F · +176° contrast
February
Air 18°F · Water 192°F · +174° contrast
December offers 47°F more contrast than July
Overview
Big Springs Group Area is located 22 miles south of West Yellowstone, Montana in beautiful Island Park, Idaho at an approximate elevation of 6,300 feet. Visitors love Island Park for its world-class fishing and outstanding scenery and wildlife viewing opportunities.Recreation
Big Springs is the headwaters of Henry's Fork and is one of the largest springs in the country. Henry's Fork is considered one of the best fly-fishing streams in the nation. Fishermen cast for rainbow and brook...
Reserve on Recreation.gov →
Swimsuit & towel
Water bottle
Stay hydrated, especially in hot water
Warm layers
Cold air before and after soaking
Camping gear
Nearby camping at Big Springs Grp. Area Island Park
Trash bag
Pack out what you pack in
Water shoes
Hot ground near source
20 miles from West Yellowstone, WY
USGS Quad: MADISON JUNCTION 15 · PP 492: 24.0 · Circ 790: 215.0 · NOAA: 91.0 · AMS Map: ASHTON
What is the water temperature at Imperial Geyser, Spray Geyser?
Imperial Geyser, Spray Geyser has a water temperature of 192°F (89°C). This is considered a hot spring, well above body temperature.
Where is Imperial Geyser, Spray Geyser located?
Imperial Geyser, Spray Geyser is located in Gallatin County, Wyoming at 7,327 feet elevation, near West Yellowstone. Coordinates: 44.5320°N, 110.8740°W.
How do I get to Imperial Geyser, Spray Geyser?
Imperial Geyser, Spray Geyser has Hike road access (1.9 mi from the road).
Is Imperial Geyser, Spray Geyser free to visit?
Imperial Geyser, Spray Geyser has Open access. It is managed by National Park Service.
Can I camp near Imperial Geyser, Spray Geyser?
Yes, Big Springs Grp. Area Island Park is located nearby (19.0 miles away).
Is it safe to soak at Imperial Geyser, Spray Geyser?
The water at Imperial Geyser, Spray Geyser reaches 192°F, which can cause severe burns. Do not enter the source pool directly — look for cooled side pools or downstream areas where the water has cooled to a safe temperature. Always tell someone your plans before visiting remote hot springs.
Is Imperial Geyser, Spray Geyser crowded?
Imperial Geyser, Spray Geyser sees varying levels of visitors depending on the season and day of the week.
What should I bring to Imperial Geyser, Spray Geyser?
Essentials for Imperial Geyser, Spray Geyser: swimsuit, towel, water bottle, warm layers for before and after soaking, camping gear, a trash bag to pack out what you pack in. The water is over 110°F — test the temperature before entering and watch for scalding near the source.