We are DIRT WURX
We Put Dirt Where it Doesn’t Belong
Dirt WurX Designs and Builds
Exclusive Design for AMA Supercross
DIRT WURX U.S.A. is the exclusive racetrack design and construction firm for Feld Motor Sports. This long-term contract means DIRT WURX U.S.A. designs and builds every course on the AMA Supercross Series Tour, and the World Supercross GP Tour.
Dirt Wurx Custom Work
Trusted by Factory Teams and Pro Riders
DIRT WURX U.S.A. has designed and constructed factory test tracks for all five U.S. factory teams (Honda, Kawasaki, KTM, Suzuki, Yamaha), as well as the test tracks of Honda R&D (Honda Proving Center of California), etc. We have also built many of the professional riders’ private practice tracks, including those of Ricky Carmichael, Robbie Reynard, Larry Ward, Kevin Wyndham, Ezra Lusk, James ‘Bubba’ Stewart and Travis Pastrana.
DIRT WURX U.S.A. has extensive experience in specialty dirt projects for the television and motion picture industry. We have worked on television shows, including NBC’s The Tonight Show with Jay Leno and ABC’s Jimmy Kimmel Live, television commercials, and even feature films including most recently Columbia Pictures, Charlie’s Angels II Full Throttle, and Supercross, The Movie.
Dirt WurX Custom Work
We Build Anything With Dirt
A significant portion of DIRT WURX U.S.A.’s business is outside the limelight of live events. We have designed and constructed many courses for arenas, fairgrounds, public riding parks, outdoor Motocross facilities, and courses for private individuals who want the very best.
DIRT WURX U.S.A. has extensive experience with USHRA Monster Truck racing, IFMA Freestyle Motocross and USHRA Off-road Car and Truck Racing, and currently builds most of the courses for these various series.
Real People, Expert Results
Built By Actual Riders
DIRT WURX employs the most talented and capable heavy equipment operators and production staff available anywhere in the world. Our entire staff has extensive experience in racing, many still race today, and all are specialists in racetrack construction. This depth of experience and work history has allowed us to grow to a point where DIRT WURX U.S.A. is now the premier racetrack design and construction team in the world.
Our Crew – At Work and At Play
Real People, Expert Results
About DirtWurx
Over the years DIRT WURX U.S.A. has demonstrated the ability to design and construct race courses that are safe but challenging to riders ranging in skill from local sportsman to world class professionals, while at the same time being exciting and spectacular to the paying fans. We maintain solid working relationships with race organizers, sanctioning organizations, racing teams, facilities, and individuals worldwide based on trust, honest business practices and reasonable cost.
Rich Winkler is a former AMA professional rider with over 30 years experience in Motocross racing, Motocross and Supercross event production, and racetrack design and construction.
Contact Us
Real People, Expert Results
Our Partners
DIRT WURX U.S.A. maintains solid working relationships with race organizers, sanctioning organizations, racing teams, facilities, and individuals worldwide based on trust, honest business practices and reasonable cost. We are proud to list these organizations as our partner in deliver excellence.
The Best Equipment on the Planet
We Build with the Best Equipment
DIRT WURX employs the most talented and capable heavy equipment operators and production staff available anywhere in the world. Our entire staff has extensive experience in racing, many still race today, and all are specialists in racetrack construction.
Designing and Building the World's Best Tracks
The Anatomy of a Supercross Track
A Supercross track represents the ultimate evolution of the sport.
Among the many obstacles riders must negotiate every lap are whoop sections (brutal washboards where riders skim along the tops of the bumps), rhythm sections (irregular series of jumps with a variety of combination options), and triple jumps (three jumps in a row that riders normally clear in a single leap of 70 feet or more).
Did You Know Track Facts?
- 88,000 Square footage of track area
- 10,000 tons of dirt / 500 Truckloads
- 16 Tractor Trailers needed to haul everything
- 30 Total Pieces of of heavy equipment
- 75 Hours of time required
- 6,800 sheets of plywood decking,
- 700+ Tuff blocks