Hot Spring

Clark County, Arizona · Near Boulder City
35.9600°N, 114.7250°W · 760 ft
86°F 77°F air · Good soaking weather 760 ft Open Hike National Park Service

Another point named plainly Hot Spring, this one about two miles from Boulder City on Park Service ground in the Lake Mead recreation area. Wikipedia ties the spot to Arizona Hot Springs, also called Ringbolt, a group of three geothermal springs near Hoover Dam. The temperature on file is in the mid eighties, a warm bath at best. Access is open, and the record includes a picture. OpenStreetMap also labels it Hot Spring.

Location
59 miles from Bullhead City, AZ

Reaching it is a hike of about two miles from the Hoover Dam-Kingman Highway. Desert floor, under eight hundred feet, bone dry, six inches of rain in a year and never snow. Averaged across the year the temperature sits in the mid seventies. Park Service land, the recreation area. No campground shows up.

Winter is the season on file, December through February. The hike is around two miles each way from the highway. Open access. No fee or camp information. The measured temperature is mild, so heat is no danger at that figure, though Wikipedia describes a cluster of springs and other vents may differ.

History of Hot Spring

Wikipedia identifies this as part of Arizona Hot Springs, also known as Ringbolt Hot Springs, three geothermal springs near Hoover Dam inside the national recreation area at Lake Mead.

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 Hot Spring.

Aerial view of the ground around Hot Spring LiDAR bare-earth view of the same ground around Hot Spring
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.

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

A slice through the ground from west to east, about 0.6 miles end to end.

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

Heat Below
111 milliwatts per square meter of heat flow

That's about 1½ times the US average of 65. It's higher than at 62% 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
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
Current Conditions
77°F
Clear N 0.0 mph 26% Good soaking weather
Tuesday 100° Low 83° Sunny 1% precip
Wednesday 99° Low 84° Sunny
Thursday 100° Low 81° Sunny 2% precip
Friday 100° Low 78° Sunny
Saturday 101° Low 77° Sunny 1% precip
Where to Stay

Some links are affiliate links. We may earn a commission at no extra cost to you.

Temperature
86°F
Warm Hot Boiling
Water Temp 86°F (30°C)
Avg Air Temp 74°F
Above Ambient +12°F
Mild soaking conditions September
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
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.