Horner Hot Springs

Kenai Peninsula Borough County, Alaska · Near Nikiski
64.9240°N, 154.8370°W · 400 ft
117°F 46°F air · Good soaking weather 400 ft Backcountry
Aerial view of the ground around Horner Hot Springs

The orange dot marks the spring, in a frame about three quarters of a mile wide.

Horner Hot Springs falls inside Kenai Peninsula Borough, with Nikiski given as the nearest town, more than three hundred miles off. The water is hot, past the point of an easy soak. OpenStreetMap lists it under the same name. Ownership and permission to visit stay open questions.

Twenty-two miles of backcountry separate it from the nearest road, listed as Lena Loop. Elevation is low, about four hundred feet. Climate on file is cold and dryish, with an average below freezing and under five feet of snow. Camping: nothing on file.

Winter months come out on top for a visit on the record. The temperature is high enough to want cooling before a soak, and it comes from a water sample taken in 1915, so expect it to have changed. Iron shows up in the old analysis. Access and fees go unrecorded.

History of Horner Hot Springs

The water here was analyzed in August 1915, and iron was among the constituents found. A USGS site number is attached.

Terrain

USGS hasn't flown a detailed laser scan here yet, so this view comes from aerial photos and older elevation data.

Setting
Hillside
The spring sits on a steep slope that climbs to the north.
Highest ground nearby
226 ft above the spring
Within a quarter mile, to the north
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.

Monthly Climate
-3°
Jan
Feb
13°
Mar
30°
Apr
46°
May
58°
Jun
60°
Jul
54°
Aug
43°
Sep
30°
Oct
Nov
Dec
Annual Precip: 23.3 in Annual Snow: 57.1 in
Best Time to Visit
January Air -3°F · Water 117°F · +120° contrast
December Air 2°F · Water 117°F · +115° contrast
February Air 5°F · Water 117°F · +112° contrast
January offers 63°F more contrast than July
Current Conditions
46°F
Light Rain and Fog/Mist E 53.9 mph Good soaking weather
Tuesday 52° Low 40° Rain Showers 100% precip
Spring is +65° warmer
Wednesday 49° Low 42° Rain Showers 96% precip
Spring is +68° warmer
Thursday 48° Low 39° Rain Showers Likely 64% precip
Spring is +69° warmer
Friday 48° Low 39° Chance Rain Showers 36% precip
Spring is +69° warmer
Saturday 45° Low 36° Slight Chance Rain Showers 19% precip
Spring is +72° warmer
Water Chemistry Sampled 1915-08-10

The water at Horner Hot Springs contains 292 mg/L total dissolved solids. It is notably rich in iron (iron-rich springs may support circulation).

Higher mineral concentration for therapeutic soaking
Calcium 10 mg/L
May support bone density and joint health
Magnesium 3 mg/L
Known for muscle relaxation and stress relief
Sulfate 45 mg/L
Traditionally used for skin conditions and inflammation
Chloride 39 mg/L
Natural antiseptic with skin health benefits
Iron 2700 µg/L
Iron-rich springs may support circulation
Temperature
117°F
Warm Hot Boiling
Water Temp 117°F (47°C)
Avg Air Temp 29°F
Above Ambient +88°F
Great soaking conditions September
Access
Road Access Backcountry
Nearest Road Lena Loop
Distance to Road 22.4 mi
Frequently Asked Questions
What is the water temperature at Horner Hot Springs?
Horner Hot Springs has a water temperature of 117°F (47°C). This is considered a hot spring, well above body temperature.
Where is Horner Hot Springs located?
Horner Hot Springs is located in Kenai Peninsula Borough, Alaska at 400 feet elevation, near Nikiski. Coordinates: 64.9240°N, 154.8370°W.
How do I get to Horner Hot Springs?
Horner Hot Springs has Backcountry road access, with the nearest road being Lena Loop (22.4 mi from the road).
What minerals are in the water at Horner Hot Springs?
Water chemistry analysis shows the presence of Total Dissolved Solids, Calcium, Magnesium, Sulfate, Chloride, Iron. Total dissolved solids measure 292 mg/L.
Is it safe to soak at Horner Hot Springs?
With care. At 117°F Horner Hot Springs is hot enough to need short sessions, fifteen to twenty minutes, and plenty of water. Enter slowly and get out if you feel light-headed.