Many trout anglers let their catch swim free after netting it. But temperature-stressed rainbow or cutthroat trout can die if they're out of water even briefly.

Trout need cool water to survive. But record heat this summer has driven water temperatures to levels that can kill fish.

Dead Fish in the Firehole: Yellowstone Shuts Down Three Iconic Rivers as Summer Heat Turns Lethal For the thousands of ...

Yellowstone National Park’s rivers and streams are closed to fishing daily from 2 p.m. to sunrise due to high water temperatures and low stream flows.

The Fly Fishing Festival includes outdoor adventures, seminars, local vendors, a silent auction, raffle items and more.

Fishing will be closed from 2 p.m. to sunrise after some water temperatures exceeded 68 degrees with streamflows below ...

Researchers are studying whether the health of aquatic insects is an early warning sign of broader changes across the Greater ...

In the middle of a riffle on the Madison River, Jackson Birrell is sprawled across river rocks, pushing all his weight on a metal bucket. He’s looking for bugs. Birrell, an aquatic entomologist and ...

Temporary full closures to fishing on the Firehole and Madison rivers and their tributaries are now in effect in Yellowstone National Park. The Gibbon River and all associated tributaries downstream ...

Add Yahoo as a preferred source to see more of our stories on Google. Two juvenile bears play on the banks of the Brooks River in Katmai National Park.Credit: Brian Adams/Travel + Leisure There are ...

Full closures to fishing went into effect yesterday on the Firehole and Madison rivers and their tributaries. The Gibbon River and all associated tributaries downstream of Norris campgrounds are also ...