Boulder County doesn’t really have any rivers, but it makes up for that with any number of mountain streams. From a fly fishers’ point of view, most of these streams are as wild as it gets on the ...

A freshwater ecologist explains why the mountain is less a postcard and more a slow-leaking, bug-monitored water machine.

National Geographic Photographer Mac Stone travels to eastern Tennessee and Great Smoky Mountains National Park with his wife and children to experience the beauty of this family-friendly region.

Mayflies, such as this larva, were among the aquatic insects that declined during the drought. (Photo by Bruce Medhurst) Small mountain streams and the vibrant ecosystems they support were hit hard by ...

Mountains cover 25% of the Earth's surface, and the streams draining these mountains account for more than a third of the global runoff. But the role that mountain streams play in global carbon fluxes ...

Warming temperatures are causing a steady rise in copper, zinc and sulfate in the waters of Colorado mountain streams affected by acid rock drainage. Concentrations of these metals have roughly ...

New research says climate change has caused toxic metal pollution to double in some Colorado rivers and mountain streams. It's complicating efforts to clean up abandoned mining sites. Now to a story ...