What is McDowell Mountain Regional Park?
Scottsdale’s mountains have two sides. The city owns the postcard side and has spent thirty years and two sales-tax votes protecting it. Maricopa County got there first on the other side, and has quietly held 21,099 acres since the Eisenhower administration.
McDowell Mountain Regional Park is entered at 16300 McDowell Mountain Park Dr., in Fountain Hills — not Scottsdale, though it’s 25 to 35 minutes from most of the north side and functionally part of the same range. Where the McDowell Sonoran Preserve gives you free trailheads and no camping, the county gives you a $10 gate fee and everything the Preserve won’t: campgrounds, a nature center, ramadas you can reserve, and a purpose-built Competitive Track where mountain bikers train and race on one-way loops sorted by difficulty.
The trail network runs more than 40 miles, and its centerpiece is the Pemberton Trail — a 15.3-mile loop across open bajada with long sight lines, mild grades and almost no technical rock. It is the best long desert circuit in the east Valley and the reason the park’s parking lots fill with bike racks every cool-season weekend. At the easy end, the 3.1-mile North Trail is as forgiving as desert hiking gets.
The landscape here also carries a scar worth understanding. In July 1995 the lightning-caused Rio Fire burned nearly two-thirds of this park — roughly 14,000 acres, by the county’s count — and if you know what to look for, the uneven saguaro distribution across whole hillsides is still telling you exactly where the flames went thirty years ago.
How to do McDowell Mountain right
Pay the fee on purpose. Ten dollars is the best crowd-control mechanism in the Valley. On a January Saturday when the Gateway trailhead is a circus and Pinnacle Peak’s lot has a queue, this park is calm. Drive the extra twenty minutes and buy the quiet.
Ride or hike Pemberton counter-clockwise. The loop’s climbing is gradual either way, but counter-clockwise puts the long grind early and hands you miles of gentle, fast descent at the end. Carry more water than the mileage suggests — 15.3 miles of exposed bajada with essentially no shade is a different proposition than 15 miles anywhere with trees. Two liters minimum in cool weather, and don’t attempt it at all between May and September.
Sort yourself onto the right track. The Competitive Track is deliberately separated from the general network: one-way travel, loops graded from easy to technical, so a beginner can lap the short loop without a racer coming through at speed. Use it as intended and it’s the friendliest place near Scottsdale to learn to ride dirt. The Scenic Trail and North Trail cover the short, mellow hiking end; the Dixie Mine Trail, reached from the Fountain Hills side of the range, is the classic walk out toward old mine workings.
Camp here, because you can’t camp there. Developed sites, group areas and youth camping are all reservable through the county, which makes this the nearest place to Scottsdale where you can legally sleep in the desert. A winter night here — no city glow to the east, coyotes doing their thing — is a genuinely different experience of the same mountains you hike from McDowell Mountain Ranch Park in town.
Watch the gate and the season. Hours are 5 a.m.–9 p.m. May through October and 6 a.m.–8 p.m. November through April. Summer here is dawn-only; see the summer sunrise hiking rules. In monsoon season the washes cross the trails and run hard — the monsoon field manual is not optional reading, and lightning on an open bajada is the real hazard, not the rain.
Make a day of it. Combine the park with Fountain Park in town — the fountain runs on the hour and it’s fifteen minutes from the gate — or stage out of ADERO Scottsdale, which sits on the Fountain Hills side and is the closest hotel to this trailhead by a wide margin.
The county got there first
Scottsdale’s open-space story is famous: a 1995 vote, a 2004 increase, a preserve that grew to about 30,500 acres and more than 230 miles of trail. The county’s story on the other side of the same mountains is older, cheaper and almost never told.
The name comes from soldiers. Camp McDowell was established in 1865 on the west bank of the Verde River, the only fort inside what are now Maricopa County’s boundaries, and it stayed an active post until 1890. The camp named the range; the range eventually named the park, the city’s preserve, a Scottsdale neighborhood and a road that runs the width of the Valley.
Maricopa County began talking about a regional park system in the 1940s, well before the Valley had any reason to think it would need one. The McDowell parcel came first as a lease in 1958 — 18,273 acres on the back side of the range, land nobody was competing for — and was formally patented to the county in 1964. Later additions brought it to today’s 21,099 acres. In other words: the county locked up twenty thousand acres of Sonoran Desert for essentially nothing, thirty-seven years before Scottsdale voters agreed to start taxing themselves to buy the other side at market prices. Timing is the whole difference between the two preserves, and it explains why one charges an entry fee while the other is free — the county has been maintaining this park on fees and general funds since before Fountain Hills existed.
Then came July 7, 1995. Lightning from a summer storm, 30-mile-an-hour winds and what the county calls “aggressively-growing non-native grasses” combined into the Rio Fire, which the county’s 2019 master plan says “burned nearly two-thirds of the Park’s total acreage (approximately 14,000 acres in all).” That phrasing leaves it unclear whether 14,000 acres was the fire’s total or the park’s share; the plan adds that native saguaro forest will take at least another six decades to return. The park took the hit. The full record of fires in the range is in our McDowell fire history.
Sonoran Desert does not recover from fire the way forest does. Saguaros are poor candidates for survival — thin skin, no bark, and the buffelgrass and other invasives that move into burned ground carry the next fire hotter and faster. Thirty years on, the Rio Fire’s footprint is still readable from the Pemberton Trail as a distribution problem: stretches where mature saguaros stand at normal density, and adjacent stretches where the tallest thing is a palo verde and the cactus are knee-high, decades from looking like a postcard. It is the best accessible lesson near Scottsdale in what fire actually costs this landscape — and a live argument, every monsoon, for why the county closes this park when lightning starts something. It did exactly that in August 2024.
What the park does best is scale. On the Preserve’s Scottsdale side you are always, somewhere in your peripheral vision, aware of the city — the rooflines of DC Ranch, the lights along the 101. Ten miles into the Pemberton loop, with the McDowells between you and Scottsdale and the Four Peaks filling the eastern sky, you are simply in the desert. Same mountains, different planet, ten dollars.
Why it matters
This is the park that proves Scottsdale’s preserve was expensive because it was late. The county secured twenty thousand acres of the same range in 1958 for a lease payment, and it has been running it as a straightforward public utility — gate fee, campground, nature center, trails — ever since. For anyone living in Scottsdale, it’s the release valve: the place to go when the free trailheads are full, the only place nearby you can sleep under the stars legally, and the clearest view anywhere of what a 1995 lightning strike still costs a saguaro forest. Pay at the gate and go long.