Hot Spring

Clark County County, Arizona · Near Boulder City
35.9600°N, 114.7250°W · 760 ft
86°F 760 ft Open Hike National Park Service
Hot Spring
File:Black Mountains (8374579531).jpg — cc by 2.0

Arizona Hot Springs (also called Ringbolt Hot Springs) reaches only 86°F but offers spectacular Colorado River canyon scenery within Lake Mead National Recreation Area. The modest temperature elevation of 11.6 degrees above ambient occurs in one of America's most iconic geothermal-recreation combinations.

This thermal spring sits at 760 feet elevation along the Colorado River corridor, requiring a challenging hike of nearly two miles (approximately 9,900 feet) from Hoover Dam-Kingman Highway. The dramatic canyon walls frame the spring's setting where desert vegetation clings to steep slopes. The river corridor provides water and landscape contrast to surrounding aridity.

History of Hot Spring

Arizona Hot Springs represents geothermal activity along the Colorado River corridor within the broader Lake Mead geothermal system. The modest temperature indicates lower geothermal gradient compared to other Arizona springs. The location's significance expanded dramatically after Hoover Dam construction in 1936 created Lake Mead.

The spring sits on National Park Service lands within Lake Mead National Recreation Area offering open public access. The two-mile hiking approach from Hoover Dam-Kingman Highway requires adequate water, sturdy footwear, and sun protection. Summer temperatures in the canyon can exceed 115°F. The area sees moderate day-use visitation.

Is Hot Spring worth visiting?

Best for

  • Warm-water soaking
Hot Spring is well suited for warm-water soaking.
Monthly Climate
53°
Jan
57°
Feb
64°
Mar
72°
Apr
82°
May
92°
Jun
98°
Jul
96°
Aug
88°
Sep
75°
Oct
62°
Nov
52°
Dec
Annual Precip: 6.1 in Annual Snow: 0.4 in
Best Time to Visit
December Air 52°F · Water 86°F · +34° contrast
January Air 53°F · Water 86°F · +33° contrast
February Air 57°F · Water 86°F · +29° contrast
December offers 46°F more contrast than July
What to Bring
Swimsuit & towel
Water bottle Stay hydrated, especially in hot water
Sun protection Limited shade in warm climate
Trash bag Pack out what you pack in
References
USGS Quad: RINGBOLT RAPIDS 7.5 · PP 492: 2.0 · NOAA: 2.0 · AMS Map: KINGMAN
Frequently Asked Questions
What is the water temperature at Hot Spring?
Hot Spring has a water temperature of 86°F (30°C). This is a warm thermal spring.
Where is Hot Spring located?
Hot Spring is located in Clark County, Arizona at 760 feet elevation, near Boulder City. Coordinates: 35.9600°N, 114.7250°W.
How do I get to Hot Spring?
Hot Spring has Hike road access, with the nearest road being Hoover Dam–Kingman Highway (1.9 mi from the road).
Is Hot Spring free to visit?
Hot Spring has Open access. It is managed by National Park Service.
Is it safe to soak at Hot Spring?
Hot Spring is generally safe for soaking at its recorded temperature. Always tell someone your plans before visiting remote hot springs.
Is Hot Spring crowded?
Hot Spring sees varying levels of visitors depending on the season and day of the week.
What should I bring to Hot Spring?
Essentials for Hot Spring: swimsuit, towel, water bottle, sun protection (hat, sunscreen), a trash bag to pack out what you pack in.
Temperature
86°F
Warm Hot Boiling
Water Temp 86°F (30°C)
Avg Air Temp 74°F
Above Ambient +12°F
Mild soaking conditions March
Access
Open
Road Access Hike
Nearest Road Hoover Dam–Kingman Highway
Distance to Road 1.9 mi
Land
Ownership Federal
Agency National Park Service
Designation National Recreation Area
Unit Lake Mead National Recreation Area
Manager National Park Service
Protection 2 - Permanent protection, some use allowed