What are they?
The northern McDowell Sonoran Preserve isn’t mountains so much as a broad granite plain with islands in it. The city’s 2015 Cultural Resource Master Plan, citing Arizona geologists, describes the country north of the range as a pediment “intruded by low granitic mountains such as the Fraesfield, Granite, and Pinnacle Peak mountains and smaller mesas such as the Brown’s, Cholla, and Cone Mountains.” Scattered among those hills are weathered outcrops that hikers have named over the years. Three have names grand enough to put on a map: Cathedral Rock, the Amphitheater and Balanced Rock. A fourth landmark, Brown’s Mountain, is the Brown’s Ranch network’s summit hike, with a spur trail to the top.
None of these names is in the federal gazetteer. The city’s Spring 2026 north-area trail map labels all four, with elevations, and that’s the closest thing to an official record. The McDowell Sonoran Conservancy calls the three rocks “iconic granite formations” and leads guided hikes to them. It has done so since at least 2008, when the land was still state trust land and a permit was required to hike it.
What nobody has published is where the names came from. Ranch hands, early hikers, climbers or the people who drew the first trail plans could all have coined them. The record doesn’t say. This page sets out what is documented and how to see each formation legally.
How to see them
Get the city’s north-area trail map first. The Preserve’s signposts carry letter-and-number markers (CM for the Cholla Mountain Loop, for example) that match the map. Much of the Brown’s Ranch network is a web of similar-looking crushed-granite trails, and the markers are how you stay on the one you meant.
Cathedral Rock and the Amphitheater, from Brown’s Ranch Trailhead. Both sit around the west and south sides of Cholla Mountain (3,406 feet on the city map), near the Cholla Mountain Loop. The map puts Cathedral Rock at 2,850 feet, near the Dry Gulch Trail, and the Amphitheater at 2,855 feet, a little to the south and east of it. The Conservancy’s guided version, the “Cathedral Rock, Amphitheater, Cholla Loop” hike, is listed at about 7 to 7.5 miles with about 280 feet of elevation gain in roughly three and a half hours, rated Difficult for the distance. A Conservancy route on the High Desert and Stagecoach trails, about 7.4 miles, stops at Cathedral Rock on the way.
Balanced Rock, from Granite Mountain Trailhead. The Conservancy describes Balanced Rock as being “along the very scenic south side of Granite Mountain.” The city map labels it at 2,856 feet and shows a Balanced Rock Trail. Shortest listed outing: the Conservancy’s “Granite Mountain Loop and Balanced Rock” at about 6.8 miles from the Granite Mountain Trailhead. Longer options in its listings are about 7.3 miles, adding the Chuckwagon, Whiskey Bottle and Turpentine trails, and about 8 miles with around 333 feet of climbing. The Granite Mountain Trailhead has restrooms but no water.
All three in one day. The Conservancy’s “Rocks Hike: Balanced, Amphitheater, and Cathedral” from Granite Mountain Trailhead runs just over 9 miles with minimal elevation change, in three and a half to four hours. It’s rated Very Difficult, purely for the mileage.
Brown’s Mountain, from Brown’s Ranch Trailhead. The map labels the summit at 3,253 feet. The trailhead sits at 2,710, so the summit is about 540 feet higher, close to the Conservancy’s “600 ft to the summit.” Its summit hike climbs the Brown’s Summit Spur and returns “via the west side and Upper Ranch Trail,” about 4.5 miles in three hours. A gentler Conservancy outing climbs the Brown’s Ranch Trail to a viewpoint it calls the Lookout, about 4.3 miles with about 450 feet of gain. From the top, look north. The 1870 Army road known as Stoneman’s Military Road ran through the pass between Brown’s Mountain and the low butte north of it, according to the Conservancy.
Practicalities. Both trailheads are free and open sunrise to sunset. Brown’s Ranch Trailhead has restrooms, drinking water, shade and horse parking. Dogs must be leashed. These trails are mostly shadeless crushed granite and get dangerously hot from April on. For the rest of the network, see our north Scottsdale hikes guide.
What the record says about each
Cathedral Rock. The Conservancy’s 2008 newsletter advertised a 5.7-mile “Trail Mix” loop about edible desert plants to “Cathedral Rocks, a Native People’s gathering place.” That’s the closest thing we’ve found to a published history of the formation, and it calls the place a cluster of rocks rather than a single tower. The name is a hazard of its own. Search “Cathedral Rock Arizona” and you’ll get Sedona’s red-sandstone spire, one of the most photographed landforms in the state. Scottsdale’s is a weathered granite outcrop on a desert plain.
The Amphitheater. The 2008 newsletter listed a 5.5-mile loop that “visits an interesting rock formation offering fine views all around,” and that is the entire published description. The name suggests a curved, bowl-like wall of rock. The city map shows it as a labeled point on the Cholla Mountain side of the network, at 2,855 feet. Field photographs would do more than any paragraph.
Balanced Rock. The 2008 newsletter’s version was a 4-mile round trip from the end of Alma School Road, “mild inclines only,” that “visits a striking rock formation” and promised “a native juniper tree, a holdover from an earlier era.” We haven’t confirmed the tree is still there. Today Balanced Rock has its own trail on the city map and appears in a half-dozen Conservancy hike listings out of Granite Mountain and Fraesfield trailheads.
Brown’s Mountain. It isn’t in the federal gazetteer either. It’s a local name, presumably taken from the ranch that surrounded it. The city map’s history panel says E.O. Brown founded Brown’s Ranch in 1917, ran it up to 44,000 acres and 3,000 to 5,000 head of cattle, and that his descendants lived there until 1970. The city acquired the land in 1999. The Preserve plan groups Brown’s with Cholla and Cone as “smaller mesas” on the granite plain. Cone Mountain is just to its southwest, at 3,061 feet on the city map. The story of E.O. Brown is on our people page, and the ranch remains are covered on the Brown’s Ranch Trailhead page.
The archaeology, and why we stay vague
People used these outcrops long before anyone named them. The city map’s history panel describes hunting and gathering parties visiting the Brown’s Ranch area for thousands of years. The Conservancy’s PastFinders, its volunteer history group, list bedrock mortars among the features they’ve recorded in the northern Preserve. These are the grinding holes the city’s archaeology overview says were used to grind mesquite pods into flour in north Scottsdale. The Preserve’s 2015 cultural resource plan counts five sites with bedrock mortars across the Preserve and keeps every location confidential. We follow the same rule and won’t say which rocks have them. If you see a smooth hole worn into a granite boulder beside the trail, look, take a photo from the tread if you like, and leave it alone. Our note on Preserve rock art explains the law.
Why there’s so little
These names came into use while the land was something other than a park. Before the city’s purchases, the northern desert was ranch range and state trust land. In 2008 the Conservancy’s mountain-bike notes described it as country where “most trails are open to dirt bikes and jeeps” and permits were required, while listing “Brown’s Ranch, Cathedral Rocks, The Amphitheater, and Balanced Rock” as its “modern and ancient history.” Names given on jeep tracks seldom get written down. The ones that survived made it onto the city’s map because volunteers kept leading hikes to them.
The record could be filled in three ways. The Conservancy’s hike leaders could say who first used each name in their listings. The city’s 1998 and 2000 trail-planning documents might show when each was first mapped. And descendants of the ranching families might remember what the cowboys called them. Until then, enjoy the rocks on their own terms.
The geology, briefly
Most of the northern Preserve’s hills and outcrops are granite. The largest body, the Carefree or Pinnacle Peak granite to the north, has been dated to about 1.4 billion years ago. Granite weathers along its joints into rounded boulders, stacked piles and overhangs, which is how a desert plain ends up with a “cathedral,” an “amphitheater” and a rock that looks like it’s about to fall. Our McDowell Mountains geology guide covers the details.