Please support our generous event sponsors!

We couldn’t put on the production with the help of our generous sponsors. Thank you to everyone that support the Ìsland Extreme Triathlon .


Onurmark race productions lLC

Official Race Production & Management Company - Onurmark was founded in 2007 to help grow endurance sports in and around the Houston, TX area. Since then we have grown beyond running events into triathlon, duathlon, splash & dash, and more. Our primary focus since 2017 and beyond has been the development of extreme triathlon both in the United States and beyond.


Negative Split ProductionS LLC

Official Race Production & Management Company - Negative Split Productions was founded in 2014 with the goal of producing unique, high-quality events in the Houston area. Since that time, we have produced or assisted in the production of over 200 events and have expanded our production services to event timing, awards & displays, and other event support services including support US National and other International events.