About Stateline Supermoto Challenge

The stateline supermoto challenge has existed since 2004. It’s the largest, longest running supermoto event in the US.  The event was created by Mad Marche Karger as a way to bring the best supermoto riders to one place to put on a kick ass race. At the time, there was factory teams and hundreds of riders in a massively growing sport.

In 2008 WHR Motorsports took over the event as the best idea of how to remember our good friend Anthony Hart. We lost Anthony in a tragic race crash back in the AMA pro days of supermoto. We race to remember him every single time.

There has been quite a few things that have been consistent with Stateline Supermoto Challenge:

  1. It’s always been about the riders. Riders come from all over the country every year — some make the trek from Canada, Japan and we have consistent attendees from Switzerland!
  2. We’ve always been at Buffalo Bills Casino (except that 1 year we were at Primm Valley)
  3. Traditionally held the first weekend of April
  4. Our dirt sections have always been awesome, challenging every skill levels
  5. Our pavement section is never the exact same as how it was before.
  6. The racing has always been amazing

The 2022 event will be April 1-3, 2022!

We have put blood, sweat, tears (and lots of dirt) into this event for the last 12 years. We’ve loved putting this event on for each and every one of our racing friends.  But unfortunately, all good things must come to an end.  Which is why we are going to make this the absolute best event we can. It’s thanks to you, and to the financial and emotional support from Pop Hart that has enabled us to run it for you for so long. We hope you all enjoy the event and keep Anthony in your heart.

Every year you all have raised Pop’s spirits because you race to remember.

— The WHR Crew


Lee I Will Never Be Able To Thank You And Everyone Involved Over The Years. The Young Racers That Have Become Men, The Bitter Sweet Joy It Brings To Me To Watch The Good Times & Great Memories .Let’s Make This The Best Year Ever. I Know My Son, My Friend, My Life, Anthony Lives On Through This Amazing Tribute. Ride To Remember 141

Pop Hart

About WHR Motorsports

We are a family owned and operated motorsports company. We’ve organized, promoted and ran 100’s of racing events from Supermoto to Flat Track to Arenacross.  We also do monster trucks, mud drags and any other motorsport you can think of.  Click on the Results menu and you can scroll back thru the YEARS of events we have put on.

How To contact us:

11608 SE 228th PL

Kent, WA 98031

(253) 520-0601

Owner: Lee Collins – [email protected]

Web Guy: Ron West (ronwest99(@)gmail.com)

Feel free to contact us with any suggestions that you may have.

If you can’t find what you’re looking for on the site, shoot over your question.

I am a racer and a motorcycle enthusiast, I will do my best to answer any questions as promptly as I can. Thanks for your support!!