Region 4: South-Central Idaho
Cities: Boise, Fairfield, Lowman, Mountain Home, Sun Valley
Atlanta Area Hot Springs
- Atlanta [ALL*] (R)
- Browns Creek [SM] [FALL] (R)
- Chattanooga [SM] [FALL] (R)
- Dutch Frank (Roaring River) [SM] [FALL] (R)
- Goat Flats
- Granite Creek [SM] [FALL] (R)
- Greylock [SM] [FALL] (R)
- Loftus [ALL] (R)
- Lynx Creek [SM] [FALL] (H)
- Ninemeyer [SM] [FALL] (R)
- Pete Creek [SM] [FALL] (R)
- Phifer (Weatherby Mill) WS [ALL] (R)
- Sheep Creek Bridge [SM] [FALL] (R)
- Smith's Cabin [SM] [FALL] (R)
- Round the Bend [SM] [FALL] (R)
- Twin Springs Resort [SP] [SM] [FALL] (R) - COMMERCIAL
- Weatherby (Hot Creek) [SM] [FALL] (R)
- Unnamed ID HS #3 (HCS) [SM] [FALL] (H)
- Unnamed ID HS #4 [SM] [FALL] (R)
Banks Area Hot Springs
- Bronco Billy (Deer Creek) [ALL] (R)
- Skinnydipper (MM 4 / Deer #2) [ALL] (H)
Boise Area Hot Springs
Burley Area Hot Springs
- Marsh Gulley [SM] [FALL] (H)
Bruneau Area Hot Springs
- Balanced Rock
- Bruneau
- Indian Bathtub (gone)
- Indian Bathtub II (Lower Indian Bathtub, Bruneau) [SM] [FALL] (R)
Carey Area Hot Springs
- Wild Rose (Mildord Sweat) [ALL] (R)
Clayton Area Hot Springs
Crouch Area Hot Springs
- Bull Creek [SM] [FALL] (M)
- Bull Rack [SM] [FALL] (M)
- Boiling Springs [SP] [SM] [FALL] (H)
- Fire Crew (Holdover) [SM] [FALL] (R)
- Groundhog I (Horseshoe) [SM] [FALL] (H)(M)
- Groundhog II (Butterfly) [SM] [FALL] (H) (M)
- Moondipper (Dash #1) [SP] [SM] (H) (M)
- Pine Burl (Dash #2) [SP] [SM] [FALL] (H) (M)
- Rocky Canyon [SP] [SM] [FALL] (R)
- Silver Creek Plunge [SM] (R) - COMMERCIAL
Featherville Area Hot Springs
- Baumgartner [SP] [SM] [FALL] (R)
- Elk Flats (bridge) [SM] [FALL] (R)
- Elk Flats (culvert) [SM] [FALL] (R)
- Lightfoot [SM] [FALL] (H)
- Paradise [ALL] (R) - COMMERCIAL
- Willow Creek [SM] [FALL] (H)
Fairfield Area Hot Springs
- Hot Springs Landing (Magic Valley) [ALL] (R)
- Preis [SP] [SM] [FALL] (H)
- Skillern [SP] [SM] [FALL] (H)
- Worswick [SP] [SM] [FALL] (R)
Garden Valley Area Hot Springs
- Brockman Creek
- Campground [ALL] (R)
- Little Anderson (Anderson) [ALL*] (H)
- Unnamed ID HS #1 (R)
Glenns Ferry Area Hot Springs
- Prince Albert [SM] [FALL] (H)
Grasmere Area Hot Springs
- Indian [SM] [FALL] (H)
Ketchum Area Hot Springs
- Clarendon Hot Springs [?] (?) 7mi from Hailey
- Frenchman's Bend [SM] [FALL] (R)
- Russian John WS [SM] (R)
- Warfield [SM] [FALL] (R)
Lowman Area Hot Springs
- Bonneville [ALL*] (H)
- Deadwood [SM] [FALL] (H)
- Kirkham [ALL*] (R)
- Pine Flats [ALL*] (H)
- Sacajawea [SM] [FALL] (R)
- Tenmile [SM] [FALL] (H)
Palisades Area Hot Springs
- Bear Creek [SM] [FALL] (M)
Stanley Area Hot Springs
- Basin Creek Campground [SM] [FALL] (R)
- Basin Creek (Cove/Kem) [SM] [FALL] (R)
- Bear Valley [SM] [FALL] (H) (M)
- Bonus [SM] [FALL] (R)
- Boundary Creek [SM] [FALL] (H)
- Dagger Creek [SM] [FALL] (H)
- Elkhorn (Boat Box) [ALL] (R)
- Mormon Bend [SM] [FALL] (R)
- Sheepeater [SP] [SM] [FALL] (M)
- Sitting Bull [SP] [SM] [FALL] (H) (M)
- Snake Pit [SM] [FALL] (R)
- Trail Flat [SM] [FALL] (M)
Sunbean Area Hot Springs
- Lunchbreak Warm Spring [SM] [FALL] (R)
- Owen Cabin [SM] [FALL] (H) (M)
- Slate Creek (Hoodoo) [ALL*] (H)
- Sunbeam [SM] [FALL] (R)
- Upper Loon (1-4) [SM] [FALL] (H) (M)
Know of a hot springs not on the above list?