Sylvan Springs

Gallatin County, Wyoming · Near West Yellowstone
44.7020°N, 110.7670°W · 7,370 ft
192°F 25°F air · Good soaking weather 7,370 ft Open Hike National Park Service Camping nearby (12.9 mi)
Very Hot Source, Use Extreme Caution

At 192°F, the source water at Sylvan Springs is hot enough to cause burns. Some hot springs this hot have cooler side pools or downstream areas suitable for soaking. Always test the water temperature before entering.

Aerial view of the ground around Sylvan Springs LiDAR bare-earth view of the same ground around Sylvan Springs
Aerial LiDAR bare earth

Drag the handle to compare the two views. The orange dot marks the spring, in a frame about three quarters of a mile wide.

Sylvan Springs is a group of hot springs in Yellowstone, a hike of about a mile off the Grand Loop Road. Near-boiling on record, and the 2007 water sample shows iron in the mix along with the usual sulfate and chloride. Gallatin County. West Yellowstone is the nearest town listed. Park Service land, open.

Location

Off the Grand Loop Road it is 1.1 miles on foot. Elevation around 7,400 feet. Snow on record is lighter here than at many park features, a bit over ten feet, and precipitation is moderate. Annual average temperature mid thirties. Yellowstone National Park land, nothing further on the designation line.

Near-boiling. Do not get close to the water. Winter is listed as the best stretch, December through February, so plan on skis or wait for the road. Indian Creek Campground is the nearest camp on record, thirteen miles away. No fee on file. No photo on record either, so go in without expectations.

History of Sylvan Springs

The USGS holds a site record for Sylvan Springs, with chemistry sampled in July 2007 that picked up iron alongside calcium, magnesium, sodium, sulfate and chloride.

Terrain

Aircraft with laser scanners measured this ground to within inches. The scan strips out trees and buildings, leaving the bare shape of the land around Sylvan Springs.

Setting
Gentle slope
The ground tilts gently up to the southwest.
Highest ground nearby
82 ft above the spring
Within a quarter mile, to the southwest
Cross-section through the spring

A slice through the ground from northwest to southeast, about 0.6 miles end to end.

Elevation data: USGS 3D Elevation Program. Aerial imagery: USGS The National Map. Public domain.

Heat Below
140 milliwatts per square meter of heat flow

That's about twice the US average of 65. It's higher than at 89% of the springs on this site.

Heat flow measures the warmth working its way up through the ground from deep inside the earth. Where it runs high, rain and snowmelt that seep down through cracks in the rock come back up hot.

Heat flow estimate: Stanford Thermal Earth Model (Aljubran & Horne, 2024), CC BY 4.0.

Monthly Climate
14°
Jan
17°
Feb
25°
Mar
30°
Apr
39°
May
51°
Jun
61°
Jul
60°
Aug
50°
Sep
34°
Oct
21°
Nov
12°
Dec
Annual Precip: 25.9 in Annual Snow: 123.1 in
Best Time to Visit
December Air 12°F · Water 192°F · +180° contrast
January Air 14°F · Water 192°F · +178° contrast
February Air 17°F · Water 192°F · +175° contrast
December offers 49°F more contrast than July
Current Conditions
25°F
ESE 5.1 mph 100% Good soaking weather
Today 62° Low 30° Sunny
Spring is +130° warmer
Wednesday 69° Low 37° Sunny
Spring is +123° warmer
Thursday 66° Low 36° Showers And Thunderstorms 77% precip
Spring is +126° warmer
Friday 59° Low 31° Rain Showers Likely 61% precip
Spring is +133° warmer
Saturday 61° Low 30° Chance Showers And Thunderstorms 25% precip
Spring is +131° warmer
Water Chemistry Sampled 2007-07-17

The water at Sylvan Springs is slightly acidic (pH 5.8). It is notably rich in iron (iron-rich springs may support circulation).

pH 5.8 Slightly Acidic
pH influences mineral absorption through skin
Calcium 21 mg/L
May support bone density and joint health
Magnesium 2 mg/L
Known for muscle relaxation and stress relief
Sodium 118 mg/L
Supports circulation and skin hydration
Sulfate 25 mg/L
Traditionally used for skin conditions and inflammation
Chloride 34 mg/L
Natural antiseptic with skin health benefits
Iron 5050 µg/L
Iron-rich springs may support circulation
Where to Stay

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Nearby Camping
Indian Creek Campground (Wy) 12.9 mi away

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...

Reservable Yes
Reserve on Recreation.gov →
Mile-High Advisory 7,370 ft

Sylvan Springs sits at 7,370 feet above sea level, way above the mile-high mark. You may not feel the altitude strongly, but hot water still dehydrates you faster at elevation. UV is about 29% stronger than at sea level, so bring sunscreen and drink more water than you normally would.

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Temperature
192°F
Warm Hot Boiling
Water Temp 192°F (89°C)
Avg Air Temp 35°F
Above Ambient +157°F
Great soaking conditions September
Access
Open
Road Access Hike
Nearest Road Grand Loop Road
Distance to Road 1.1 mi
Land
Ownership Federal
Agency National Park Service
Designation National Park
Unit Yellowstone National Park
Manager National Park Service
Protection 1 - Permanent protection, natural state
Frequently Asked Questions
What is the water temperature at Sylvan Springs?
Sylvan Springs has a water temperature of 192°F (89°C). This is considered a hot spring, well above body temperature.
Where is Sylvan Springs located?
Sylvan Springs is located in Gallatin County, Wyoming at 7,370 feet elevation, near West Yellowstone. Coordinates: 44.7020°N, 110.7670°W.
How do I get to Sylvan Springs?
Sylvan Springs has Hike road access, with the nearest road being Grand Loop Road (1.1 mi from the road).
Is Sylvan Springs free to visit?
Sylvan Springs has Open access. It is managed by National Park Service.
Can I camp near Sylvan Springs?
Yes, Indian Creek Campground (Wy) is located nearby (12.9 miles away).
What minerals are in the water at Sylvan Springs?
Water chemistry analysis shows the presence of pH, Calcium, Magnesium, Sodium, Sulfate, Chloride, Iron. The pH is 5.8 (slightly acidic).
Is it safe to soak at Sylvan Springs?
No, not at the source. The water at Sylvan Springs reaches 192°F, which can cause severe burns within seconds. Look for cooled side pools or downstream stretches, and test with a hand before anything else.
Sources: USGS NWIS