Alcova Hot Springs

Natrona County, Wyoming · Near Mills
42.5450°N, 106.7250°W · 5,501 ft
129°F 45°F air · Good soaking weather 5,501 ft Open Short Walk Bureau of Reclamation Camping nearby (3.1 mi)

Hot water beside a reservoir. Alcova Hot Springs comes up on Bureau of Reclamation ground at Alcova Reservoir in Natrona County, Wyoming, roughly twenty-seven miles from Mills. The flow is listed at 129 degrees, too hot to sit in as it emerges, and access is recorded as open. The land is tagged as a recreation management area.

Location

Dry country, about a foot of rain in a typical year and a winter that drops four feet or so of snow. The spring is a third of a mile from the Alcova Dam Access Road, a short walk. Elevation is around 5,500 feet. Pete's Draw Campground is about three miles off, the closest on the record.

The water comes out hot enough to burn, so test it before any part of you goes in and look for where it has cooled. Winter shows as the best season on file. Pete's Draw is close for camping. No fee is noted, and access is open, though this is Reclamation land around a dam, so current reservoir rules apply.

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 Alcova Hot Springs.

Aerial view of the ground around Alcova Hot Springs LiDAR bare-earth view of the same ground around Alcova Hot Springs
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
Canyon floor
Steep ground climbs away on both sides of the spring.
Highest ground nearby
366 ft above the spring
Within a quarter mile, to the northwest
Cross-section through the spring

A slice through the ground from northwest to southeast, about 0.6 miles end to end.

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

Heat Below
63 milliwatts per square meter of heat flow

That's close to the US average of 65. It's higher than at 2% 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
19°
Jan
20°
Feb
32°
Mar
40°
Apr
51°
May
67°
Jun
75°
Jul
72°
Aug
62°
Sep
45°
Oct
33°
Nov
20°
Dec
Annual Precip: 12.9 in Annual Snow: 51.7 in
Best Time to Visit
January Air 19°F · Water 129°F · +110° contrast
February Air 20°F · Water 129°F · +109° contrast
December Air 20°F · Water 129°F · +109° contrast
January offers 56°F more contrast than July
Current Conditions
45°F
Clear E 16.6 mph 66% Good soaking weather
Today 78° Low 53° Mostly Sunny 12% precip
Spring is +51° warmer
Wednesday 81° Low 49° Mostly Sunny then Slight Chance Showers And Thunderstorms 19% precip
Spring is +48° warmer
Thursday 77° Low 52° Chance Showers And Thunderstorms 39% precip
Spring is +52° warmer
Friday 78° Low 46° Mostly Sunny 8% precip
Spring is +51° warmer
Saturday 73° Low 43° Sunny then Slight Chance Showers And Thunderstorms 24% precip
Spring is +56° warmer
Where to Stay

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Nearby Camping
Pete's Draw Campground 3.1 mi away

Pete's Draw has both a day-use and overnight camping area to enjoy hiking, wildlife viewing, picnicking, fishing, boating and camping. There's a parking area, vault toilet, seven overnight campsites with picnic tables, fire rings, shelters, tent pads, and RV parking, trash receptacle, and a hardened pedestrian trail. No water is available at this campground. Campsites are first come, first served. No overnight parking is allowed in the day use area. This campground receives heavy visitatio...

Fee $10 per night for overnight camping. No fee for day use.
Stay limit 14 days
Reserve on Recreation.gov →
Mile-High Advisory 5,501 ft

Alcova Hot Springs sits at 5,501 feet above sea level, way above the mile-high mark. You may not feel the altitude strongly, but hot water still dehydrates you faster at elevation. UV is about 22% stronger than at sea level, so bring sunscreen and drink more water than you normally would.

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Temperature
129°F
Warm Hot Boiling
Water Temp 129°F (54°C)
Avg Air Temp 45°F
Above Ambient +84°F
Great soaking conditions September
Access
Open
Road Access Short Walk
Nearest Road Alcova Dam Access Road
Distance to Road 0.3 mi
Land
Ownership Federal
Agency Bureau of Reclamation
Designation RMA
Unit Alcova Reservoir
Manager Bureau of Reclamation
Protection 3 - Protected, subject to extractive use
Frequently Asked Questions
What is the water temperature at Alcova Hot Springs?
Alcova Hot Springs has a water temperature of 129°F (54°C). This is considered a hot spring, well above body temperature.
Where is Alcova Hot Springs located?
Alcova Hot Springs is located in Natrona County, Wyoming at 5,501 feet elevation, near Mills. Coordinates: 42.5450°N, 106.7250°W.
How do I get to Alcova Hot Springs?
Alcova Hot Springs has Short Walk road access, with the nearest road being Alcova Dam Access Road (0.3 mi from the road).
Is Alcova Hot Springs free to visit?
Alcova Hot Springs has Open access. It is managed by Bureau of Reclamation.
Can I camp near Alcova Hot Springs?
Yes, Pete's Draw Campground is located nearby (3.1 miles away). $10 per night for overnight camping. No fee for day use..
Is it safe to soak at Alcova Hot Springs?
With care. At 129°F Alcova 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.