It is the third year the Memorial Hermann Ironman will be held. Fifty competitors will qualify for the ironman world championships in Hawaii.
The competition includes a 2.4-mile swim in Lake Woodlands, a 112-mile bike ride through farmland and the Sam Houston National Forest, and a 26.2-mile run in The Woodlands.
The finish line is on Waterway Square Place.
If you're out there cheering on the athletes today, make sure to send photos to us at news@abc13.com.
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