Mt Lemmon Observatory Area Spring

## Overview Mt Lemmon Observatory Area Spring is a natural spring located high in the Santa Catalina Mountains north of Tucson, Arizona, at an elevation of approximately 8,000 feet. Situated near the Mt. Lemmon SkyCenter observatory complex, this spring sits within the Coronado National Forest — a sky island ecosystem where alpine conditions contrast dramatically with the Sonoran Desert far below. The Santa Catalina range is known for its complex geology, featuring Precambrian gneiss, Catalina granite, and metamorphic rock formations that create natural aquifers and seeps throughout the higher elevations. Springs in this area have historically been used by the Tohono O'odham and Apache peoples, and later by miners, ranchers, and early settlers who relied on mountain water sources in the arid Southwest. The GPS coordinates for this spring are **32.4359345, -110.7924551**, placing it in the upper reaches of the mountain near the observatory and the small community of Summerhaven. Water flow at high-elevation springs in the Santa Catalinas can vary significantly with seasonal snowmelt and monsoon rains, typically running strongest in late winter through spring and again during the July–September monsoon season. ## Directions 1. From Tucson, head east on East Tanque Verde Road or Grant Road to the Catalina Highway (also known as the Mt. Lemmon Highway / General Hitchcock Highway). 2. Follow the Catalina Highway north approximately 25 miles as it winds up the mountain through multiple ecological zones. 3. Continue past the village of Summerhaven toward the Mt. Lemmon SkyCenter / observatory area near the summit. 4. The spring is located in the vicinity of the observatory complex at the coordinates listed above (32.4359345, -110.7924551). A GPS device or smartphone navigation is recommended for pinpointing the exact location, as the spring may be off the main road along a forest trail or pulloff. *Note: The Catalina Highway is a paved, well-maintained scenic byway, but it is steep and winding. An Adventure Pass or day-use fee may be required for parking within the Coronado National Forest.* ## What to Expect Visitors to the Mt Lemmon Observatory Area Spring will find themselves in a cool, forested mountain environment — a welcome contrast to the desert heat of Tucson, which can be 20–30°F warmer at lower elevations. The surrounding landscape features ponderosa pine, Douglas fir, and mixed conifer forest typical of the Catalina sky island ecosystem. Because this spring is at high elevation in a relatively remote forest setting, the area is generally quiet and scenic. Wildlife sightings — including Abert's squirrels, white-tailed deer, and a variety of mountain bird species — are common. The spring's flow may range from a steady trickle to a more robust seep depending on recent precipitation. Visitors have historically used mountain springs in this area as water sources, though water quality has not been independently verified at this specific location. The area can experience winter snow and ice, and the Catalina Highway is occasionally closed during winter storms. Summer monsoon afternoons often bring brief but intense thunderstorms, so plan accordingly. Cell service can be limited near the summit. Nearby Summerhaven offers a few small restaurants and shops for those looking to make a day of the visit.