AUBURN, Wash. (AP) — Spectators cheered as participants ran down the track cloaked in inflatable Tyrannosaurus rex costumes during the T-Rex World Championship Races at Emerald Downs in Auburn, Washington.

The Sunday event started in 2017 as a pest control company’s team-building activity.

The actual dinosaur roamed the planet between 65 million and 67 million years ago. A study published four years ago in the journal Science estimated about 2.5 billion of the dinosaurs roamed Earth over the course of a couple million years.

Hollywood movies such as the “Jurassic Park” franchise have added to the public fascination with the carnivorous creature.

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This is a photo gallery curated by AP photo editors.

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