The tragedy occurred just days after the 38-year-old shared a haunting message to her fans.

A high-profile fitness influencer has been confirmed dead after vanishing during the swimming leg of a triathlon in Texas.

Much-loved Brazilian influncer Mara Flavia Souza Araujo — who has more than 60,000 followers on Instagram — was found dead in about 10 feet of water in Lake Woodlands in the North Shore Park area.

She was 38 years old.

Tragically, her death occurred shortly after she told followers to savour every moment of life — which she likened to a train that could “drop you off at the eternal station” at any moment.

The Montgomery County Sheriffs Department identified the body on Monday.

“MCSO can confirm that Mara Flavia Souza Araujo, 38, of Brazil died while competing in the Ironman event in the Woodlands on Saturday,” the sheriff’s statement said.

“Preliminary investigations indicate she drowned during the swimming portion of the event.

Just days before the event, she shared a picture of herself standing on railroad tracks.

“Enjoy this ride on the bullet train that is life,” she wrote in Portuguese.

“And even with the speed of the machine blurring the landscape, look out the window — for at any moment, the train will drop you off at the eternal station.”

Araujo was an experienced triathlete who had completed at least nine other events over the past nine years.

A representative for the event could not be immediately reached for comment.

“We send our deepest sympathies to the family and friends of the athlete and will offer them our support as they go through this very difficult time,” race organisers said in a statement.

“Our gratitude goes out to the first responders for their assistance.”

– With NBC News