Conservationist Terry Tempest Williams puts herself on frontline of climate fight
A longtime advocate for public lands, Terry Tempest Williams has been at the forefront of fighting for conservation. This year, she stepped into the firing line
Vintage posters of America's national parks – in pictures
A collection of posters created to promote tourism to the national parks is part of the creative legacy of the New Deal developed by Franklin D Roosevelt
Vintage films show risky (and hilarious) behavior in US national parks – video
The rules of acceptable – and lawful – behavior in the US National Parks have changed drastically over the past 100 years
America’s most remote site – the undiscovered side of Yellowstone
The south-eastern edge of Yellowstone National Park in Wyoming takes a week of backpacking to hike in and out and is populated by wolves and grizzly bears
'We need to preserve this beauty': your memories of US national parks
Celebrating 100 years of the National Park Service: readers' photo and stories
Where to stay in the 10 most popular US national parks
Animal jams and selfies: Yellowstone deals with record number of tourists – video
Yellowstone national park is trying to manage crushing tourism that tangles roadways, spawns traffic accidents and provokes clashes between humans and the park’s natural world
Increase in Yellowstone visitors raises park's concerns over wildlife and safety
Park rangers reassess how to manage tourist violations, staff burnout and ‘animal jam’ as number of national park guests peaked to four million last year
10 of the least-visited US national parks
With US national parks such as Yosemite and Yellowstone facing overcrowding, we take a look at 10 beautiful but little-known parks where you’re more likely to see a bear, moose or ‘champion tree’ than another human
Climate change will mean the end of national parks as we know them
As the National Parks Service turns 100 this week, we look at how receding ice, extreme heat and acidifying oceans are transforming America’s landscapes, and guardians of national parks face the herculean task of stopping it
If US national parks are to continue to thrive they must reflect the diversity of our population
James Edward Mills
As the National Park Service turns 100, a new campaign aims to make the country’s natural spaces more appealing to all Americans, regardless of race, over the next century
What do America's national parks mean to you? Share your stories and photos
The National Parks Service celebrates its 100th birthday in August. How have America’s natural wonders impacted your life? Share your stories and photos
