Geyser — Not a Soaking Spring
Monument Geyser Basin 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:GAPNN006 (Dog Bone Pool) (9 August 2013) 8.jpg — cc by 2.0
Monument Geyser Basin emerges at 197 degrees Fahrenheit at 7,320 feet elevation, requiring a 650-meter uphill hike from Grand Loop Road. Recent USGS analysis measured 90.7 degrees Celsius with high sodium (407 mg/L) and chloride (562 mg/L) concentrations. The water runs 164 degrees above ambient.
The basin occupies a steep thermal hillside above the Gibbon River where annual snowfall reaches 123 inches and precipitation totals nearly 26 inches. Cone-shaped sinter deposits give the area its name, with weathered thermal features scattered across the slope in lodgepole pine forest.
History of Monument Geyser Basin
The basin gained recognition from early Yellowstone explorers documenting the park's thermal features. The eroded cones represent dormant or dying geysers, with the area seeing minimal human development beyond trail construction. The site remains in permanent protection under National Park Service management.
Hike between June and September when snow clears the moderately strenuous uphill trail. Elevation gain and uneven footing require fitness and appropriate footwear. Indian Creek Campground, 22.6 kilometers away, provides the nearest base camp. Allow two hours round-trip from the trailhead.
Is Monument Geyser Basin worth visiting?
Best for
- Observing powerful hot springs
- Overnight camping trips
- Winter soaking with dramatic temperature contrast
Monument Geyser Basin is well suited for observing powerful hot springs and overnight camping trips.
Annual Precip: 25.9 in
Annual Snow: 123.1 in
December
Air 11°F · Water 197°F · +186° contrast
January
Air 12°F · Water 197°F · +185° contrast
February
Air 15°F · Water 197°F · +182° contrast
December offers 48°F more contrast than July
Recent Temperature
195.3°F
(90.7°C)
Measured Oct 15, 2007
The water at Monument Geyser Basin is slightly acidic (pH 6.7). It is notably rich in sodium (supports circulation and skin hydration) and chloride (natural antiseptic with skin health benefits).
pH influences mineral absorption through skin
May support bone density and joint health
Known for muscle relaxation and stress relief
Supports circulation and skin hydration
Traditionally used for skin conditions and inflammation
Natural antiseptic with skin health benefits
Overview
Located about eight miles (13 km) south of Mammoth Hot Springs on the road to Norris, Indian Creek Campground—elevation 7,300 feet (2225 m)—sits near the base of the Gallatin Mountains and offers breathtaking views of Electric Peak. The area offers easy access to fishing and hiking. The campground is away from the main road and provides a quieter, more primitive, experience than many other locations.
For reservations at the campgrounds managed by Yellowstone National Park Lodges (Fi...
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 Indian Creek Campground (Wy)
Trash bag
Pack out what you pack in
Water shoes
Hot ground near source
8 miles from West Yellowstone, WY
USGS Quad: MADISON JUNCTION 15 · PP 492: 16.0 · Circ 790: 215.0 · NOAA: 48.0 · AMS Map: ASHTON
What is the water temperature at Monument Geyser Basin?
Monument Geyser Basin has a water temperature of 197°F (92°C). This is considered a hot spring, well above body temperature.
Where is Monument Geyser Basin located?
Monument Geyser Basin is located in Gallatin County, Wyoming at 7,320 feet elevation, near West Yellowstone. Coordinates: 44.6840°N, 110.7530°W.
How do I get to Monument Geyser Basin?
Monument Geyser Basin has Short Walk road access, with the nearest road being Grand Loop Road (0.4 mi from the road).
Is Monument Geyser Basin free to visit?
Monument Geyser Basin has Open access. It is managed by National Park Service.
Can I camp near Monument Geyser Basin?
Yes, Indian Creek Campground (Wy) is located nearby (14.0 miles away).
What minerals are in the water at Monument Geyser Basin?
Water chemistry analysis shows the presence of pH, Calcium, Magnesium, Sodium, Sulfate, Chloride. The pH is 6.7 (slightly acidic).
Is it safe to soak at Monument Geyser Basin?
The water at Monument Geyser Basin reaches 197°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 Monument Geyser Basin crowded?
Monument Geyser Basin sees varying levels of visitors depending on the season and day of the week.
What should I bring to Monument Geyser Basin?
Essentials for Monument Geyser Basin: 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.