Dirt Don’t Hurt.

Bike Skills for All Ages

303 Dirt was established by World Champion Myles Rockwell and Freestyle Star Gurion Blattman. 303 Dirt offers unique bike camps and birthday parties for youth ages 6-16. 303 Dirt focuses on honing mountain bike and BMX skills including turning, braking, jumping, and more! We explore the 42 acres at Valmont Bike Park. All camps are taught by experienced coaches. Private skills coaching, trail riding sessions and “day away” camps are available upon request for kids and adults.

We have Friday afternoon sessions from 4-6pm every week during the season. Click on our Camps or Sign Up link to book your next ride! We also offer semi private classes on weekday afternoons from 4-6pm for 4-6 riders. Get your friends together and give us a call! If you are interested in booking a group session, private coaching, “day away” adventures or hosting a birthday party, please contact Willow Rockwell directly at 720-552-4346. We will find the perfect day and time for you!

Join 303 Dirt – the best experience at Valmont Bike Park for “kids” of all ages!


My 7 year old loves his lessons at 303Dirt! Gurion is an amazing rider and an inspiring coach. His wonderful rapport with kids, enthusiasm, and encouragement ensure that my son works hard, stays safe, and has fun!


Gurion Blattman

I am an IMBA certified coach, with a passion for riding and coaching. Several years ago, I sold my business on the East Coast to move to Boulder with my family to enjoy the outdoors and the over 300 days of sunshine a year. Riding at Valmont bike park, I saw a lot of kids riding without safety gear, with the wrong bikes, and without the skills they needed to be safe. I started providing free skills clinics with my son to his friends and some of our neighbors. Soon after, 303Dirt was formed with the philosophy of small classes taught by experienced riders. Our goals are to provide an experience for kids that is fun, exciting and safe, and to build the foundation for a life-long passion for biking.

Myles Rockwell

Myles Rockwell is a mountain biking legend. After years of pursuing his dream, he became the Downhill World Champion in 2000. He encountered numerous hurdles along the way, including breaking both legs in a motocross accident in 1997. His doctors believed he would never race again. Myles still loves to mountain bike today. He aims to give back to the community by offering his exceptional bike coaching skills and inspiring life story to positively influence the next generation. He is the president and co-founder of Rockwell Ridewell, a father of three, and a dedicated husband and mentor.

Miriam Van EK

Miriam is a big proponent of getting more ladies on bikes!  She grew up in Colorado and recently graduated from University of Colorado Boulder.  She rides for The Fix Bike Shop and her favorite styles of riding are dirt jumping and downhill.  She is also a board member for the CheckIn Foundation, which aims to raise mental health awareness in the mountain biking community.  When Miriam’s not riding her bike, she is probably hiking with her dog Aspen, or eating way too much dessert

Dylan Shomaker

Dylan started riding cross-country bikes when he was 19 but when he moved to Boulder in 2013 he quickly transitioned to riding dirt jumps almost exclusively. Now Dylan rides dirt jumps, downhill, trail, and BMX daily. Dylan has been a part of the Valmont Bike Park trail crew for four years. Dylan recently graduated from CU Boulder with a Geography degree. Dylan’s favorite thing on a bike is flowing dirt jumps and doing whips.

Let’s Ride!

Contact Myles or Gurion directly for private sessions.
gurion7@hotmail.com  |  203-952-6865
mylesrockwell1@gmail.com  | 970-749-3957

Gurion is a amazing rider and even better teacher! My two small groms have so much fun in his class and ride fundamentally better because of him.

News & Updates

Take A Kid to Valmont Day June 8th!

Hello everyone! We are looking forward to the 6th Annual Take a Kid Mountain Biking Day at Valmont Bike Park. Join us June 8th from 9-11 AM for pump track coaching with 303 Dirt and Rockwell Ridewell! You can find us at our tent or head directly to the pump track....

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It’s Time to Ride!

The bike park is open and we have after school bike camps available! Sign up now, lets rock! We are also booking birthday parties for kids ages 6-16, hit us up if you are interested! Contact gurion7@hotmail.com to plan your special...

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Adventure Film Festival!

Join us, along with award-winning filmmakers, visionary conservationists, and the world’s foremost names in adventure at the Adventure Film Festival’s 14th annual flagship event in Boulder, Colorado! This three-day adventure immersion showcases a weekend of activities...

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303 Dirt supports the Rockwell Ridewell Foundation, providing bikes and mentoring to youth in need.