Discover America's
Hot Springs

A field guide to 1,723 thermal springs across the United States. Temperature data, water chemistry, access info, and nearby camping.

1,723 Thermal Springs
23 States
Records

National Superlatives

Hottest in America
266°F
Sherman Crater Fumaroles
Washington
Most Mineral-Rich
40,700 mg/L
Crystal (Madsens) Hot Springs
Utah
Highest Elevation
14,217 ft
Mt Rainier Fumaroles
Washington
Water Chemistry

pH Extremes

1.5
Most Acidic
Coso Hot Springs
California
9.9
Most Alkaline
Sulphur Creek Hot Spring
Idaho
Minerals

Richest Springs by Mineral

Total Dissolved Solids
Higher mineral concentration for therapeutic soaking
40,700 mg/L
Crystal (Madsens) Hot Springs Utah
Calcium
May support bone density and joint health
1,500 mg/L
Gas Rocks Hot Spring Alaska
Magnesium
Known for muscle relaxation and stress relief
460 mg/L
Gas Rocks Hot Spring Alaska
Sodium
Supports circulation and skin hydration
18,000 mg/L
Gas Rocks Hot Spring Alaska
Sulfate
Traditionally used for skin conditions and inflammation
8,900 mg/L
Unnamed Spring New Mexico
Chloride
Natural antiseptic with skin health benefits
32,000 mg/L
Gas Rocks Hot Spring Alaska
Iron
Iron-rich springs may support circulation
92,000 µg/L
Sulphur Springs New Mexico
Explore All Minerals →
At a Glance

America's Thermal Springs

1453
springs with recorded water temperature data
650
springs with water chemistry analysis
683
roadside springs with easy access
1172
springs with nearby camping
Featured

Notable Springs

Warm Spring
Gallatin County County, Wyoming · Near West Yellowstone
Warm Short Walk Open
Steam Vents At Roaring Mountain
Gallatin County County, Wyoming · Near West Yellowstone
Hot Short Walk Open
Springs On Fairy Creek
Gallatin County County, Wyoming · Near West Yellowstone
Hot Hike Open
Hot, On Lamar River
Park County County, Wyoming · Near Livingston
Warm Hike Open
Hot Springs
Gallatin County County, Wyoming · Near West Yellowstone
Hot Short Walk Open
Hot Springs
Gallatin County County, Wyoming · Near West Yellowstone
Hot Backcountry Open
By the Numbers

States with the Most Hot Springs

1 California
319 2 Nevada
314 3 Idaho
235 4 Wyoming
132 5 Oregon
126
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Explore by State

Alaska 115 springs Arizona 66 springs Arkansas 6 springs California 319 springs Colorado 69 springs Florida 2 springs Georgia 7 springs Hawaii 11 springs Idaho 235 springs Massachusetts 1 springs Montana 62 springs Nevada 314 springs New Mexico 81 springs New York 1 springs North Carolina 1 springs Oregon 126 springs South Dakota 2 springs Texas 11 springs Utah 116 springs Virginia 11 springs Washington 30 springs West Virginia 5 springs Wyoming 132 springs