Upcoming Events

December 7th, 2019, Phoenix, AZ
Our second USMTO Regional series the 2019 Southwest Regional Muaythai Championships will be held in Dec 2019 and we are excited that registration is now open! More Event Info

About USMTO & Siam Fight Productions

The US Muay Thai Open® brand was founded in 2015 by Siam Fight Productions LLC. Siam Fight Productions is a promoter of combat sports in the Muay Thai market segment. This tournament series was developed for the mission of preparing American youth and future Muay Thai athletes for international competitions. “USMTO” has grown tremendously over the last 3 years, from one tournament per year with 143 athletes in 2015 to 3 planned regional events in 2019 with over 1260 athlete members registered for competition. An average of 450 athletes have competed at each tournament in the Fall 2017-Spring 2018 season with over 172 division champions emerging. Proof of concept was realized at the 2018 IFMA Youth World Championship in Bangkok, when the USA team was honored with the prestigious “Best Team” award for the first time in history.


We are the leading innovator in Muaythai event management and have played a large role in the development of groundbreaking technology to propel Muaythai events forward.


When you compete at our national events, we aim for you to see a noticeable difference in what we call the “athlete experience” – as we design our events with an athlete-first mentality. We provide top-quality uniform singlets, spare no expense on our Thai-Style belts, and give custom Muaythai shorts to division champions.


When you are competing in a division with 20+ athletes, safety is extremely important so that injuries are minimized. Using our rule set modeled after IFMA, we use chest protection and headgear for a true “olympic-level” caliber of competition.

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 U.S. Muay Thai Open ® (USMTO) East and West Championships.

The USMTO is open to amateur 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 propel Muay Thai towards recognition as a mainstream sport.

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Live Scoring Tournament Video

Unparalleled Events Technology

We are the first and only organization to have helped develop and fully implement the leading Muaythai tournament technology. The new RSportz registration process makes signing up for coaches and athletes easier than ever. Coaches are able to create rosters and invite their athletes to their team, who can then sign up with their information filled in for them. In our effort to promote fair play and judging, our live scoring is able to be seen by everyone, and also creates detailed player statistics.


Resources for Athletes


Please read all of the rules so that your questions will be answered. We have spent a tremendous effort making them comprehensive.

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Questions, questions, and more questions? We have the answers. Please first check our FAQ, and if you do not find the answer. please submit a trouble ticket so we can track your issue.

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Official USMTO App

Stay up to the minute with our app! Get push notifications for important athlete updates during competition and more.

Google Play


Stay Up To Date With The Latest Updates and Event Info

Muaythai Madness: 2019 USMTO West March Update

ON SALE!! Spread the word: The USMTO is making deals.  We'll celebrate by lowering entry fees! See the new fee schedule below: Register by March 24, 2019 (Bracket Consolidation) - $139 Register by March 31, 2019 - $149 Register by April 7, 2019 - $159 Register by...

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2019 USMTO West Championships – January Update

Despite the cold January weather, excitement is heating up around the country as the USMTO, North America's most popular tournament series, kicks off it's 2019 season!  Check out last year's achievements!  Want to add new excitement for 2019?  Everyone: bring one new...

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2018 USMTO East Championships: October Update

Athletes & Coaches: This update contains critical information! Read this entire update and complete all the listed tasks. October Update Sponsored by:  Click or tap for 15% off with Promo Code: "USMTO" Travel Friendly With no Color added – No Staining Thai Oil...

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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

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Register to Compete!

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