Thorn Spring

Pendleton County, West Virginia · Near Franklin
38.6050°N, 79.3530°W · 1,800 ft
72°F 53°F air · Good soaking weather 1,800 ft Open Roadside NGO Camping nearby (12.8 mi)
Aerial view of the ground around Thorn Spring LiDAR bare-earth view of the same ground around Thorn 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.

A tepid spring in a small park outside Franklin, in Pendleton County, West Virginia. Thorn Spring Park belongs to a nonprofit and is listed as open to the public, which makes this one of the easier thermal points in the state to stand beside. The water is room temperature. Think of it as a roadside curiosity a few minutes from town.

Location

The spring sits about fifty feet off the road at 1,800 feet, in hills where winters bring two and a half feet of snow and the rest of the year stays damp. You park and you are there. The record tags the ground as a local park.

Open year round as far as the record shows, and winter is when the climate numbers line up best. Camping means a drive: Spruce Knob Lake is the nearest listed, nearly thirteen miles out. The water chemistry on file comes from a sample taken in 1935, long enough ago that the mineral figures are historical. No heat to speak of, so no safety concerns there.

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 Thorn Spring.

Setting
Canyon floor
Steep ground climbs away on both sides of the spring.
Highest ground nearby
469 ft above the spring
Within a quarter mile, to the southwest
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
59 milliwatts per square meter of heat flow

That's close to the US average of 65. It's higher than at 1% 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
31°
Jan
35°
Feb
41°
Mar
52°
Apr
62°
May
68°
Jun
73°
Jul
70°
Aug
66°
Sep
55°
Oct
43°
Nov
38°
Dec
Annual Precip: 41.5 in Annual Snow: 30.3 in
Best Time to Visit
January Air 31°F · Water 72°F · +41° contrast
February Air 35°F · Water 72°F · +37° contrast
December Air 38°F · Water 72°F · +34° contrast
January offers 42°F more contrast than July
Current Conditions
53°F
Clear N 0.0 mph 98% Good soaking weather
Today 79° Low 58° Sunny
Wednesday 88° Low 64° Patchy Fog then Sunny 2% precip
Thursday 87° Low 66° Slight Chance Rain Showers then Chance Showers And Thunderstorms 47% precip
Friday 83° Low 62° Showers And Thunderstorms Likely 70% precip
Saturday 78° Low 64° Partly Sunny then Chance Rain Showers 36% precip
Water Chemistry Sampled 1935-05-18

The water at Thorn Spring contains 118 mg/L total dissolved solids.

Higher mineral concentration for therapeutic soaking
Calcium 38 mg/L
May support bone density and joint health
Magnesium 4 mg/L
Known for muscle relaxation and stress relief
Sodium 1 mg/L
Supports circulation and skin hydration
Sulfate 6 mg/L
Traditionally used for skin conditions and inflammation
Chloride 1 mg/L
Natural antiseptic with skin health benefits
Nearby Camping
Nearby Camping
Spruce Knob Lake 12.8 mi away

Overview The Spruce Knob Lake Campground is tucked in a beautiful hardwood forest less than a mile from Spruce Knob Lake. The campground provides a peaceful setting with easy access to boating on the lake and hiking through the mountainous region. Spruce Knob Lake Campground is comprised of 28 standard camping units, 2 double camping units, and 10 walk in camping units with fire rings, lantern posts, picnic tables and paved spurs (standard camping units). In addition, there is a developed hos...

Reservable Yes
Reserve on Recreation.gov →
Temperature
72°F
Warm Hot Boiling
Water Temp 72°F (22°C)
Avg Air Temp 53°F
Above Ambient +19°F
Mild soaking conditions September
Access
Open
Road Access Roadside
Distance to Road 48 ft
Land
Ownership Non-Profit
Agency NGO
Designation LP
Unit Thorn Spring Park
Manager UNK
Protection 4 - No known protection
Frequently Asked Questions
What is the water temperature at Thorn Spring?
Thorn Spring has a water temperature of 72°F (22°C). This is a warm thermal spring.
Where is Thorn Spring located?
Thorn Spring is located in Pendleton County, West Virginia at 1,800 feet elevation, near Franklin. Coordinates: 38.6050°N, 79.3530°W.
How do I get to Thorn Spring?
Thorn Spring has Roadside road access (48 ft from the road).
Is Thorn Spring free to visit?
Thorn Spring has Open access. It is managed by NGO.
Can I camp near Thorn Spring?
Yes, Spruce Knob Lake is located nearby (12.8 miles away).
What minerals are in the water at Thorn Spring?
Water chemistry analysis shows the presence of Total Dissolved Solids, Calcium, Magnesium, Sodium, Sulfate, Chloride. Total dissolved solids measure 118 mg/L.
Sources: USGS NWIS