DINOSAUR, Colo. (AP) — A 66-year-old Colorado man has died kayaking on a river in Dinosaur National Monument.

National Park Service spokeswoman Sonya Popelka says the man drowned on Saturday after hitting a rock in the TePee Rapid of Yampa River.

READ MORE: Blue Angels Jet Makes Emergency Landing At Great Colorado Air Show

The man’s partner paddled 24 miles (39 kilometers) downriver from the rapid to Hells Canyon Ranch and alerted authorities.

A helicopter found the man’s body about 3 miles (5 kilometers) downriver from the rapid.

READ MORE: Marijuana Social Equity Fair Seeks To Level The Playing Field For Communities Of Color

Dinosaur National Monument (credit: CBS)

The death is the second river fatality at Dinosaur this year.

The man’s name had not been released as of Sunday night. He is a resident of Craig, Colorado.

MORE NEWS: Hikers Discouraged From Climbing Kit Carson Peak As Madeline Baharlou-Quivey's Body Recovered

(© Copyright 2017 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)