The Colorado and Green rivers. Jackson Lake beneath the Tetons. These bodies of water offer some of the best paddling experiences, in some of the greatest settings in the National Park System, and you can experience them in 2016 with your fellow park travelers during a trip with National Parks Traveler. What better way to mark the centennial of the National Park Service?

Legislation aimed at opening streams and rivers in Grand Teton and Yellowstone national parks to packrafters would undermine the authority of the National Park Service to manage these parks and "set a very poor precedent," says National Park Service Director Jon Jarvis.

Population tallies of grizzly bears in the Greater Yellowstone Ecosystem are far from being reliable and could be off by as much as 40 percent, according to a wildlife advocacy group in Wyoming.

Claims by the Interagency Grizzly Bear Study Team that the grizzly bear population in the Greater Yellowstone Ecosystem is growing and genetically diverse are off-base, according to a wildlife biologist who long has studied the population and spent 17 years doing research for the team.