Unnamed Thermal Spring

Millard County, Utah · Near Fillmore
38.8690°N, 112.4840°W · 4,761 ft
72°F 50°F air · Good soaking weather 4,761 ft Roadside Camping nearby (9.9 mi)
Aerial view of the ground around the spring LiDAR bare-earth view of the same ground around the 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.

An unnamed thermal point in Millard County, about ten miles from Fillmore, sitting on Hot Spring Road. The water comes up tepid, low seventies. A 1985 sample found it salty and iron bearing, with dissolved solids several times what you would find in tap water. No name, no owner, no access status. The road name is the best clue to what is here.

Location

You can nearly park on top of it. Hot Spring Road runs within ninety feet of the source. Elevation is a little under five thousand feet. Snowfall is about four feet a year and total moisture fifteen inches, a dry valley with cold winters. No land unit or designation appears on file and there is no photograph to show you what to expect.

December through February is the rated season. Adelaide Campground, about ten miles out, is the camping anyone has noted. Public access is unknown, so ask around about who holds the ground before you pull over. Iron and salt in the water will stain and will smell. That temperature reading dates to 1985.

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 this spring.

Setting
Open ground
Flat, open ground all around.
Highest ground nearby
10 ft above the spring
Within a quarter mile, to the southwest
Cross-section through the spring

A slice through the ground from south to north, about 0.6 miles end to end.

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

Heat Below
82 milliwatts per square meter of heat flow

That's about 1½ times the US average of 65. It's higher than at 18% 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
28°
Jan
33°
Feb
43°
Mar
51°
Apr
61°
May
75°
Jun
82°
Jul
80°
Aug
69°
Sep
54°
Oct
41°
Nov
28°
Dec
Annual Precip: 14.5 in Annual Snow: 46.8 in
Best Time to Visit
January Air 28°F · Water 72°F · +44° contrast
December Air 28°F · Water 72°F · +44° contrast
February Air 33°F · Water 72°F · +39° contrast
January offers 54°F more contrast than July
Current Conditions
50°F
Clear SE 16.6 mph 40% Good soaking weather
Today 86° Low 54° Mostly Sunny 7% precip
Wednesday 85° Low 53° Mostly Sunny then Slight Chance Showers And Thunderstorms 16% precip
Thursday 84° Low 50° Sunny 9% precip
Friday 81° Low 46° Sunny 3% precip
Saturday 80° Low 45° Sunny 2% precip
Water Chemistry Sampled 1985-09-27

The water at This spring is neutral (pH 6.8) with 5000 mg/L total dissolved solids. It is notably rich in calcium (may support bone density and joint health), magnesium (known for muscle relaxation and stress relief), and sodium (supports circulation and skin hydration).

pH 6.8 Neutral
pH influences mineral absorption through skin
Higher mineral concentration for therapeutic soaking
Calcium 460 mg/L
May support bone density and joint health
Magnesium 96 mg/L
Known for muscle relaxation and stress relief
Sodium 1,000 mg/L
Supports circulation and skin hydration
Sulfate 1,100 mg/L
Traditionally used for skin conditions and inflammation
Chloride 1,900 mg/L
Natural antiseptic with skin health benefits
Iron 30 µg/L
Iron-rich springs may support circulation
Nearby Camping
Nearby Camping
Adelaide Campground 9.9 mi away

Overview Adelaide Campground is located in Corn Creek Canyon on the south end of the Pahvant Mountain Range near Kanosh, Utah.Recreation Corn Creek offers brown and rainbow trout fishing. Hiking and biking trails begin nearby, and the Paiute ATV trail can be easily accessed from the site.Facilities The campground offers 1 group site which can accommodate 48 guests and up to 15 vehicles. 9 individual sites are also available. These sites can accommodate 6 to 8 guests and 2 vehicles. All of th...

Reservable Yes
Reserve on Recreation.gov →
Temperature
72°F
Warm Hot Boiling
Water Temp 72°F (22°C)
Avg Air Temp 54°F
Above Ambient +18°F
Mild soaking conditions September
Access
Road Access Roadside
Nearest Road Hot Spring Road
Distance to Road 87 ft
Frequently Asked Questions
What is the water temperature at ?
has a water temperature of 72°F (22°C). This is a warm thermal spring.
Where is located?
is located in Millard County, Utah at 4,761 feet elevation, near Fillmore. Coordinates: 38.8690°N, 112.4840°W.
How do I get to ?
has Roadside road access, with the nearest road being Hot Spring Road (87 ft from the road).
Can I camp near ?
Yes, Adelaide Campground is located nearby (9.9 miles away).
What minerals are in the water at ?
Water chemistry analysis shows the presence of pH, Total Dissolved Solids, Calcium, Magnesium, Sodium, Sulfate, Chloride, Iron. The pH is 6.8 (neutral). Total dissolved solids measure 5,000 mg/L.
Sources: USGS NWIS