Experience the magic of night trail riding in the Sonoran desert at the Adrenaline Night Trail Rides held on a rolling 9.5 mile loop at McDowell Mountain Regional Park. This is a perfect beginner night ride with distances for all. Ride past towering saguaro cactus under the night stars!
This race is the 2nd in the Insomniac Night Trail Ride Series with events across the greater Phoenix, Arizona area. Join us and “Carpe Noctem” to “seize the night”!
Frenzy Hills Rides is a choose-your-own-adventure day on two wheels at McDowell Mountain Regional Park in Fountain Hills. With mountain bike and gravel distances ranging from 8 miles all the way to 100 miles, there really is an option for almost every kind of rider.
The courses roll through classic Sonoran Desert terrain using portions of Escondido, Pemberton and the Long Loop trails, with saguaros, wide-open desert and some of the Valley’s most recognizable mountain views as the backdrop. Riders looking for an endurance challenge can take on the 100 or 50-mile races, while 25, 15 and 8-mile options make the event accessible to riders who aren’t interested in spending their entire day in the saddle.
Frenzy also includes a 9-hour relay, junior races and a 25-mile Adaptive MTB race, making this much more than an event for hardcore endurance racers.
Prefer skinny-ish tires and drop bars? The Frenzy Gravel Grinder takes advantage of the smoother, less technical portions of McDowell Mountain Park, with 25, 50 and 100-mile gravel options, along with duo and quad relay categories.
Mountain bike or gravel. Solo or team. Eight miles or a hundred. Pick your bike, pick your distance, and spend a cool Arizona day riding through some spectacular Sonoran Desert country.
FRENZY HILLS RIDES
DECEMBER 7, 2025
100 Mile | 50 Mile | 25 Mile | 10 Mile
50 Mile Relay | Duo
100 Mile Relay | Duo | Quad
100 Mile | 50 Mile | 25 Mile Gravel Grind
50 Mile Gravel Relay | Duo
100 Mile Gravel Relay | Duo | Quad
Juniors Mountain Bike Races
McDowell Mountain Regional Park
Fountain Hills, AZ
Test your endurance on a 25 mile loop rolling through McDowell Mountain Regional Park. Whether you tackle the full 100 mile solo, one of our relay events, or just get the gears rolling with the 10 miler, we want to get you out on the trails to ride with us! Utilizing some of the local favorites, the loop will ride portions of Escondido, Pemberton, and the Long Loop trails. Welcome the cooler weather and race through the gorgeous Sonoran desert landscape, with some of the valley’s more iconic peaks in the background. We aim to have the right distance for anyone, so find the ride that suits you best, and saddle up for a great time in the desert!
Back for Year Two!
The Frenzy Gravel Grinder features the best of McDowell Mountain Park with less of the technical and rocky parts. Choose one loop for 25 miles or go two for 50. Can you hang with the big dogs? We have a 100 mile Gravel option as well. New for 2024…we are offering 50 mile duo as well as 100 mile duo and quad Gravel relay categories. Gravel bikes with drop bars are required for all of the gravel categories.
Experience the magic of night trail riding in the Sonoran desert at the Adrenaline Night Trail Rides held on a rolling 9.5 mile loop at McDowell Mountain Regional Park. This is a perfect beginner night ride with distances for all. Ride past towering saguaro cactus under the night stars!
This race is the 2nd in the Insomniac Night Trail Ride Series with events across the greater Phoenix, Arizona area. Join us and “Carpe Noctem” to “seize the night”!
