Ride Hard.
Race Strong.
STMS.
Together We Are One
Welcome to the STMS Mountain Bike Team Sonoran Trails Middle School and associated with Cactus Shadows Mountain Bike Team — competing in the Arizona Cycling Association (ACA) and building champions on and off the trail.
Quick Links
📢 Announcements
Latest news from the team
Season Kick Off Event — Tuesday, April 21
Start time: 5:00 PM
Join us for the season kick-off event at:
Pre-Season Training — Saturday, April 25
Location and time TBD — check the TeamSnap application for updates.
Pre-Season Training — Tuesday, April 28
Location and time TBD — check the TeamSnap application for updates.
Pre-Season Training — Tuesday, May 5
Location and time TBD — check the TeamSnap application for updates.
Pre-Season Training — Saturday, May 9
Location and time TBD — check the TeamSnap application for updates.
Regular Season Start — Monday, June 1
The 2026 regular season officially begins on June 1.
Team Participation Fees Due — Thursday, July 9
2026 season participation fees must be paid by July 9 to ensure all gear is ordered in time for Team Pictures and the first race of the season.
Sponsor Contribution and Logo Dues — Thursday, July 9
All sponsor contributions and logo dues must be submitted by July 9.
Last Day to Order Team Kit — Thursday, July 23
This is the final day to submit your team kit order. Order here.
Practice Skills Drills — Saturday, July 25
Join the team for practice skills drills and preseason preparation.
Parents Brunch — Saturday, August 15
Join us at Desert Willow Park for the parents brunch.
Tubeless Refresh — Saturday, September 5
Add sealant to your tires and get your bike ready for race season.
Race #1 — Sunday, Sept 13 — Fort Tuthill County Park, Flagstaff
Race #2 — Saturday, Sept 26 — Pioneer Park, Prescott
Race #3 — Sunday, Oct 11 — Venue TBA
Race #4 — Saturday, Oct 24 — McDowell Mountain Regional Park
ACA State Championships — Saturday-Sunday, Nov 7-8 — Fort Huachuca
🏔️ About the Team
Who we are and what we do
The STMS Mountain Bike Team Sonoran Trails Middle School and associated with Cactus Shadows Mountain Bike Team competes in the Arizona Cycling Association (ACA), the largest middle and high school mountain bike league in Arizona. Riders develop fitness, bike handling skills, teamwork, and a love for the outdoors while competing on iconic Sonoran Desert trails.
Fill Out Registration
Complete the online registration form with parent/guardian info.
ACA Membership
Register on the Arizona Cycling platform.
Gear Check
Ensure your bike and helmet meet ACA safety requirements.
Attend Practice
Show up to our weekly practices and get ready to race!
We also participate in the ACA's Try It Out (free!) program. If you're on the fence, all riders, parents, and sponsors are able to use this one-time program to meet the coaches, meet their fellow riders, and have all questions answered.
🚵 Practice Schedule
Weekly training sessions
Tuesday
Evening · Local Trails (varies) · Bike lights required for night rides
Thursday
Evening · Local Trails (varies) · Bike lights required for night rides
Saturday
Morning · Local Trails (varies)
* Practice locations may change — check Announcements for updates
Ready to Ride?
Register your rider today and join the STMS Mountain Bike Team Sonoran Trails Middle School and associated with Cactus Shadows Mountain Bike Team for the 2026 season.
Register Now →