Fantasy Island: Tucson’s Original Sonoran Flow

Out in the creosote flats on Tucson’s east side, somebody built a mountain bike trail system on terrain that had no real business being one — and the result is Tucson’s most beloved, most democratic, and most unapologetically good time network.

The mountain bikers of Tucson have been coming here ever since.

Fantasy Island Defined

Fantasy Island is Tucson’s original purpose-built mountain bike trail system — a flat, flowing network of largely directional singletrack on the southeast side of the city, built by riders for riders, managed by the Sonoran Desert Mountain Bicyclists (SDMB) in partnership with the City of Tucson.

No mountains. No granite. No consequence to speak of. Just pure desert singletrack with soul baked in from the beginning.

Should You Ride Fantasy Island?

Ride it if:

• You’re new to mountain biking and want a genuine introduction to desert singletrack without the overhead of technical terrain
• You’re bringing kids or a mixed-ability group and need somewhere that works for everyone
• You want a quick, fun lap close to the east side of town
• You’re visiting Tucson and want to understand where the local MTB culture started, or ease into this whole desert thing
• You ride an eMTB — Fantasy Island is one of the only officially eMTB-legal networks in Tucson
• You want to do a night ride — permitted and a guaranteed good time at Fantasy

Skip it if:

• You’re chasing technical terrain, big climbing, or desert consequence — head to TMP, 50 Year, or Lemmon
• You’re an expert rider with limited time in Tucson — there are more rewarding destinations for your skill level
• You expect flow in the Whistler sense — this is Tucson, berms are not our strong suit

Planning a Tucson trip? Look no further than Tucson Mountain Biking: Start Here →

Quick Stats

• Trail Miles: ~16 miles
• Elevation Gain: Minimal — this is the flattest network in Tucson
• Difficulty: Green to Blue
• Direction: Mostly one-way, counter-clockwise — look for the signs
• Surface: Desert singletrack, sandy sections, occasional embedded rock
• Best Bike: Anything — hardtail flies here, eMTB welcome
• eMTB: Officially permitted — one of very few Tucson networks where this is true
• Night Riding: Permitted
• Permit: Arizona State Trust Land permit required to park
• Managed by: SDMB / City of Tucson
• Destination: Tucson

What to Expect

Fantasy Island sits in the creosote flats of the Tucson basin — pan flat, open desert, with none of the mountain feel that defines the city’s other networks. No sky island, no volcanic range, no granite. Just the wide open southeastern desert with saguaro giving way to creosote and the mountains visible on the horizon.

On paper it shouldn’t work. In practice it absolutely does.

The trails are purpose-built for mountain bikes — directional, well-signed, designed for momentum and fun rather than challenge and consequence. The Tucson MTB community built this place from scratch and has maintained it with genuine care ever since. That history shows in the trail quality and in the community that still shows up here.

What you won’t find: sustained climbing, technical features, exposure, or the kind of terrain that demands everything. What you will find: flowing singletrack that rewards commitment to pour it on, a network with genuine personality, and the particular satisfaction of a place that knows exactly what it is and delivers it completely.

A word on flow: Tucson doesn’t really do flow in the conventional sense. No machine-cut berms, no sculpted transitions, no pump track aesthetic. What Fantasy Island offers is natural desert momentum (okay, with a bit of help from a shovel here and there) — the kind that comes from reading terrain and committing to speed rather than being guided through it. Call it flow bashfully. It earns the description on its own terms.

How the Network Works

Fantasy Island divides into two distinct sections connected by trail and attitude.

The North — Lone Cactus Loop is the primary corridor with multiple side loops branching off it — riders can dial the mileage from a quick spin to an extended spin depending on how many extensions they add. Well-signed, intuitive, community-maintained. Start here.

The South — Flatter, simpler, and home to the network’s most beloved feature — more on that below. Requires an Arizona State Trust Land permit. The Bunny Loop is the natural starting point for true beginners and the natural warm-up for everyone else.

The Loop connection: Fantasy Island connects directly to the Tucson Loop — the city’s urban trail network. Riders from the east side of town can arrive without loading a car. Combined with connections around the city, Tucson’s trail network is more bikeable from the city than most riders realize.

Navigation Reality Check

Fantasy Island is the easiest network in Tucson to navigate. Directional trails, regular signage, and a layout that loops back toward the trailhead at regular intervals mean getting genuinely lost is challenging.

How to Ride It Right

Bring a hardtail or short-travel bike if you have the option. The terrain doesn’t reward suspension — it rewards light, fast, and nimble. Riders who show up on enduro bikes have a fine time but they’re bringing a shovel to a fork fight.

Night riding here is genuinely excellent. The flat terrain and directional trails make it manageable without full lighting rigs. SDMB runs regular Last Saturday Night Rides. Worth experiencing at least once.

Who It’s For / Skip It

Fantasy Island is for: Beginners getting their first real taste of desert singletrack. Families and mixed-ability groups who need somewhere that works for everyone. Local riders who want a quick Tuesday evening lap close to the east side. Anyone who wants to bask in the sands of early Tucson MTB culture. eMTB riders who want one of the only officially legal options in the city.

Skip Fantasy Island if: You’re an expert with one day in Tucson and a choice to make — the mountain networks will reward your skills more completely. You’re chasing views, elevation, or technical terrain. You need to be wowed.

The Good

Purpose-built for mountain bikes from the beginning — Fantasy Island was designed for riders by riders before most Tucson trail systems had any MTB-specific infrastructure. That intentionality shows in the trail quality, the directional flow, and the signage that makes navigation genuinely easy.

The eMTB access is significant in a city where almost everywhere else says no officially. The network has always been progressive — this is consistent with how Fantasy Island has operated from the beginning.

The Loop connection puts Fantasy Island within reach of a large portion of the city on two wheels. Combined with the night riding permission and the beginner-friendly terrain it’s the most accessible network in Tucson in every sense of that word.

And the community. SDMB built this place and still maintains it with genuine care. The trail culture here — the one-way rules, the volunteer trail work, the stuffed bunny collection on the Bunny Loop — reflects a community that takes the place seriously without taking itself too seriously.

The Bad

The terrain ceiling is real and low. Experienced riders will exhaust what Fantasy Island offers technically in a single visit. The flatness that makes it perfect for beginners makes it limited for anyone chasing challenge. There are no views to compensate, no dramatic landscape, no sky island backdrop. It’s creosote flats and singletrack and that’s the whole offer.

Sandy sections in places — particularly after rain or in the washes — can slow things down and frustrate riders expecting consistent hardpack throughout.

Development pressure is a real concern. The park’s southeast Tucson location means urban growth encroaches regularly. The community watches this carefully and advocates accordingly.

The Dirty

Do the Bunny Loop. Even if you’re well beyond beginner level. The bunnies alone are worth it — a community-maintained collection of toy and stuffed rabbits weathering quietly in the Sonoran Desert, scattered along the trail by riders who understood that a trail system with a name like Fantasy Island deserves to commit to the bit. The desert does strange things to a stuffed animal over time. It’s wonderful.

That’s Fantasy Island. The place has always done things its own way.

The Verdict

Fantasy Island is where Tucson mountain biking congealed — purpose-built, community-maintained, and still delivering exactly what it promised from the beginning.

Come here to begin. Come here to introduce someone to the sport. Come here on a Tuesday evening when you want singletrack without overhead. Come here to find the bunnies.

One of Tucson’s originals. Still running.