Diminished flows and invasive species are redefining the character of the Colorado River as it flows through Grand Canyon National Park.

There is a certain "culture" that helps define Lake Mead National Recreation Area, one that is clinging to this manmade oasis in the desert that climate change is shrinking and threatening its purposeful existence.

A piece of Western settlement history -- Mormon Row in today's Grand Teton National Park -- is being restored to preserve both structures and the stories tied to them.

A massive development proposed for Grand Canyon National Park's southern gateway town of Tusayan threatens to change the community's character and strain the groundwater that fuels the park's springs and seeps.

A number of incidents early in this year's climbing season at Denali National Park and Preserve has prompted climbing rangers at the park to voice concerns that not all the climbers who hope to spend time in the Alaska Range this year are fully prepared for the challenges they'll encounter.

Apologies in advance to my brethren in the travel writing industry, and their editors, but your suggestions for national parks to visit this summer are incredibly ridiculous for the most part and most likely to produce a miserable vacation.

An iconic early 20th-century mountain home along the Blue Ridge Parkway built by textile magnate Moses Cone and his wife, Bertha, is being restored to its elegant original appearance.

The bus came to a stop on the gravel along the road. My son and I stood up, grabbed our packs from the overhead racks, and started down the aisle. The other passengers stared as we left the bus and slung our packs on our backs. They seemed surprised that anyone could get off the bus at a place like this.

Imagine a Cadillac Mountain summit with fewer vehicles, smaller buses and greater respect for nature and fellow visitors. One where visitors can rest assured they will have a place to park and can enjoy a safer and more enjoyable experience on Cadillac’s breathtaking summit.

If we put a firmer dollar figure on nature, governments and businesses are likely to pay more attention to it and take better care of it.

It only took a matter of days for the Slims River, Ä’äy Chù in Southern Tutchone, to reduce from a large glacial river to a mere stream amongst a dusty plain. Four days to be exact. News swirled around the world as yet another sad confirmation of human caused climate change.

While some national parks are so busy that they require reservations, others make it easy to get off the beaten path – like Guadalupe Mountains National Park in Texas.

After the National Park Service recruited Dr. Donna Shaver to build a sea turtle science program at Padre Island National Seashore, a role that saw her bring the program to international prominence, the agency now appears to be squandering her success and hoping she'll retire.

It was as they were waiting for us. Almost as soon as we set foot on the historic Navajo Bridge at Glen Canyon National Recreation Area, the condors took to the air, stretching their wings to catch a ride on the afternoon thermals.

When the U.S. Army in 1849 bought a fur trading post near the confluence of the Laramie and North Platte rivers on the windswept plains of the Wyoming Territory, it wasn't exactly a turnkey operation.

Of 19 national historic trails administered by the National Park Service in conjunction with several other federal agencies, four – California, Oregon, Mormon Pioneer, and Pony Express - follow the Platte River Valley across Nebraska. Both the California and the Oregon National Historic Trails pass through Ash Hollow, a favorite stop for many pioneers as noted in their journals.

Beneath the waves that roll ashore on the Olympic Coast is a symphony of life. Clinging to the rocks and going largely unnoticed by many beach visitors, a cast of characters straight out of a Sci-Fi movie busily move about. It may seem like the most hostile of environments but, to countless animals and seaweeds, it’s heaven on Earth.

This lesser-known national park in Maryland contains significant natural beauty, with some presidential history for good measure.

The giant sequoias, the world’s most massive trees, have been in California’s Sierra Nevada for 200 million years. Now this species that stood when dinosaurs walked the Earth faces new threats. Is its longevity at risk?

You’re not mistaken. A national park vacation has gotten more expensive than it was 20 years ago. Considerably more expensive in some costs.