Upcoming Events


NEW EVENT DATES & VENUE:  Apr. 20-23rd, 2023 | Mesa, Arizona 
We are excited to welcome all athletes, coaches, and fight fans out to Mesa, AZ for our 2023 US Open Spring Championships! This special event is open to all Amateur & Professional athletes worldwide and features industry-leading safety rules that provide a balance between excitement and safety. CLICK HERE FOR EVENT INFO.

The US Open™ is one of the most prestigious Muay Thai evens in North America! The US Open is open to all Muay Thai athletes worldwide.


 The US Open is a leading innovator in Muay Thai event management and has played a large role in the development of groundbreaking technology that revolutionized the sport of Muay Thai.


US Open athletes can gain a year’s worth of experience in just one event!  Meet and mingle with athletes from across the globe.  One community under one roof!


The US Open priortizes athlete safety.  All events are regulated by state commissions and all athletes compete under the supervison of licensed doctors, emergency medical technicians. 

Get The Experience You Crave

World-Class Athletes & Coaches

Siam Fight Productions seeks to unite the best Muay Thai athletes, coaches, and fans throughout the world at the annual US Open Muay Thai Championships!

The US Open is open to amateur and professional athletes worldwide and it’s goal is to prepare U.S. Muay Thai athletes for success in international competitions, to foster solidarity throughout the international Muay Thai community and to continue to propel the sport of Muay Thai to new heights.

USMTO Group Photo 2018

Next Event Begins In








Live Scoring Tournament Video

Simple Yet Effective Technology

The US Open is an industry leader in safety as well as technology for the sport of Muay Thai in the United States.  We are happy to partner with Kihapp to provide a straight-forward tournament management  solution.

Kihapp Logo


Resources for Athletes


The US Open Official Rules ensure fairness and promote safety. 

Learn More


Questions?  Check out our FAQs.  If you still need help, please submit a trouble ticket to reach our support team.

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Stay Up To Date With The Latest Updates and Event Info


Buy something cool from one of our sponsor partners! Thank You ;o)

“A great & well run event! It is extremely difficult to manage a crowd of that size with that many variables, but the folks at USMTO and Siam did it very well. Weigh ins, medicals, etc. were done very quickly compared to other events. The brackets & bout orders were done the night before which gave our team enough time to plan logistics for the next day.”

Emily Ann Nielsen, Revolution Muay Thai – Athlete

Start Registration Now

Register to Compete!

Start by going to your preferred event page, and begin the registration process.