The National Park Service is investigating a medical mystery after multiple people returning from river rafting trips in the ...

Rafters in the Grand Canyon are coming down with a mystery illness and doctors are baffled - ‘It feels like I did a hard ...

Multiple people who paddled the Colorado River have described symptoms including fever, chills, fatigue and fluid in their lungs.

A rafting trip through the Grand Canyon left a Utah man fighting an unknown illness, but he's not the only one dealing with ...