As the competitors in the 2016 Flycasting World Championships arrived at their hotel in Nelijarve, Estonia, some noticed a 12-year-old girl jumping on the hotel’s trampoline.

The girl, Maxine McCormick of San Francisco, was not a tourist. She was their competition.

Maxine was competing in four events in the biennial championships of this niche sport, in which the world’s best handlers of flies and rods test their skills in a series of accuracy and distance competitions. Maxine, instead of tinkering with her equipment ahead of the competition or fretting over the wind, spent most of her time on the trampoline, jumping or lying down and reading on it. Once, she fell asleep.

Then she trounced every other woman in the competition’s most popular event, trout accuracy, in which competitors cast into a series of rings. Her score was also higher than those of all the men except one: her coach, Chris Korich. She placed third in the salmon distance event, using back muscles honed by hours of tree climbing to propel her line 127 feet.

“She’s the most efficient fly caster on the planet,” said Korich, who has been coaching Maxine since 2013. “I don’t know anyone in history that can claim to be better.”