Monkey Spring

Santa Cruz County, Arizona · Near Rio Rico
31.6370°N, 110.7030°W · 4,574 ft
82°F 66°F air · Good soaking weather 4,574 ft Short Walk Camping nearby (7.8 mi)
Aerial view of the ground around Monkey Spring LiDAR bare-earth view of the same ground around Monkey 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.

Warm water in the low eighties, half a mile off the nearest road in Santa Cruz County: that is Monkey Spring. Rio Rico is the closest town, about nineteen miles away. The spring is a USGS thermal point more than a destination, and the record carries no land owner and no statement on public access, so nobody has said on paper that you can walk to it.

Location

Half a mile separates the spring from the nearest road, which has no name on record, at a little over forty-five hundred feet. Winters bring a few inches of snow. Rain is modest, around fifteen inches. No land unit or designation is listed, and no fee either. The Kentucky Camp cabin, eight miles away, is the nearest overnight stop in the record.

Winter is the rated season. The only temperature on file is a single reading. Access status and land ownership are both missing; check them before driving out. No fee is listed either. The water is warm enough to feel and too cool for a hot soak.

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 Monkey Spring.

Setting
Valley floor
Gentle slopes rise on both sides.
Highest ground nearby
162 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.

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 20% 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
47°
Jan
50°
Feb
57°
Mar
63°
Apr
70°
May
81°
Jun
78°
Jul
77°
Aug
73°
Sep
67°
Oct
56°
Nov
47°
Dec
Annual Precip: 14.6 in Annual Snow: 3.8 in
Best Time to Visit
January Air 47°F · Water 82°F · +35° contrast
December Air 47°F · Water 82°F · +35° contrast
February Air 50°F · Water 82°F · +32° contrast
January offers 34°F more contrast than June
Current Conditions
66°F
E 3.6 mph 87% Good soaking weather
Tuesday 84° Low 64° Chance Showers And Thunderstorms 64% precip
Wednesday 83° Low 63° Showers And Thunderstorms 79% precip
Thursday 86° Low 62° Chance Showers And Thunderstorms 26% precip
Friday 89° Low 63° Sunny 8% precip
Saturday 90° Low 64° Slight Chance Showers And Thunderstorms 13% precip
Nearby Camping
Nearby Camping
Kentucky Camp Cabin And Headquarters Building 7.8 mi away

Overview Kentucky Camp Cabin and Headquarters is located in the Santa Rita Mountains near Sonoita, Arizona in the Coronado National Forest. The five adobe buildings originally served as headquarters for the Santa Rita Water and Mining Company from 1902 to 1906. The facility also served as a cattle ranch from the 1920s through the 1960s. The Forest Service acquired the land in 1989 and it has since become an ideal location for guests seeking a unique lodging experience, rich in mining and ranc...

Reservable Yes
Reserve on Recreation.gov →
Temperature
82°F
Warm Hot Boiling
Water Temp 82°F (28°C)
Avg Air Temp 64°F
Above Ambient +18°F
Mild soaking conditions September
Access
Road Access Short Walk
Distance to Road 0.5 mi
Frequently Asked Questions
What is the water temperature at Monkey Spring?
Monkey Spring has a water temperature of 82°F (28°C). This is a warm thermal spring.
Where is Monkey Spring located?
Monkey Spring is located in Santa Cruz County, Arizona at 4,574 feet elevation, near Rio Rico. Coordinates: 31.6370°N, 110.7030°W.
How do I get to Monkey Spring?
Monkey Spring has Short Walk road access (0.5 mi from the road).
Can I camp near Monkey Spring?
Yes, Kentucky Camp Cabin And Headquarters Building is located nearby (7.8 miles away).
Sources: USGS NWIS