Dirt Don’t Hurt.

Bike Skills Clinics for All Ages

303 Dirt offers bike skills clinics and camps for youth ages 6-16 at Valmont Bike Park in Boulder, Colorado. Improve your mountain bike and BMX skills including turning, braking, and jumping with our experienced coaches. Private bike skills coaching, trail riding skills, and half day camps are available for kids and adults.

303 Dirt was founded by MTB Downhill World Champion Myles Rockwell & BMX Freestyle Star Gurion Blattman.

Bike Camps

During our bike camps for kids ages 6-16, we explore pump tracks, dirt jumps, slopestyle, berms, and skills loops at Valmont Bike Park.

Skills Clinics

Our afternoon skills sessions are from 4-6 pm every weekday during the season. Join us one time or weekly to fine-tune your bike skills.

Private Coaching

We offer private and semi-private classes on weekday afternoons from 4-6 pm. Small group size limited to 4-6 riders.

My 7 year old loves his mountain biking lessons with 303Dirt! Gurion is an amazing rider and an inspiring bike 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 MTB Skills 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 bike skills clinics with my son to his friends and some of our neighbors. Soon after, 303Dirt was formed with the philosophy of small group 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 and a member of the Mountain Biking Hall of Fame. After years of pursuing his dream, he became the MTB 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

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 an amazing rider and even better teacher! My two small groms have so much fun in his bike skills 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 day!

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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.