Changing appearance throughout the seasons, the black oak is one of the iconic trees of Yosemite Valley, and its acorn is used for food by both animals and people.

Horsetail Fall is a small, ephemeral waterfall that flows over the eastern edge of El Capitan in Yosemite Valley. For two weeks in February, the setting sun striking the waterfall creates a deep orange glow.

Snow plays an important role in Yosemite's ecology while providing water for cities and farms. Winter visitors to the park experience a landscape transformed by snow.

Former Yosemite social scientist Bret Meldrum started Resource Management and Science Division's newest branch, Visitor Use and Social Sciences, in 2007. Before working at Yosemite National Park, Meldrum worked with NPS data as a...

View this description of the Half Dome hike and how you can be best prepared to complete it (9:42).

There were an estimated 10,000 grizzly bears in California in 1850, and less than 75 years later, there were none. Yosemite's past is filled with stories of this magnificent animal.

Yosemite's vast acreage and remote location protect some of the darkest night skies in the country. Astronomers, photographers, and city dwellers flock to the park to take advantage of this unique opportunity to view planets, stars, and...

Water in Yosemite is incredibly beautiful, but can be powerful and deadly. Sixteen people died in Yosemite's creeks and rivers between 2002 and 2011. Yosemite Search and Rescue rangers share their knowledge of common mistakes and how to...

Yosemite's vast acreage and remote location protect some of the darkest night skies in the country. Astronomers, photographers, and city dwellers flock to the park to take advantage of this unique opportunity to view planets, stars, and...

Yosemite features over 30 engaging youth and education programs. Highlighted here are seven amazing programs that were supported by the Yosemite Conservancy in 2011.

Photographer Ted Orland speaks about the importance of photography in Yosemite's early history.

Although most visitors are familiar with Yosemite Valley, 95 percent of Yosemite National Park is designated Wilderness. Free from roads and cars, this vast wilderness offers spectacular scenery, natural quiet, and the opportunity for...

Throughout the Sierra Nevada, high flat plateaus are found at elevations around twelve and thirteen thousand feet. These isolated sky islands are the home to unique plant communities that are found nowhere else.

Winter is a magical time to visit Yosemite, with opportunities for hiking, playing in the snow, and quiet solitude. The silence and beauty of Yosemite in winter is an unforgettable experience.

Every fall, students from surrounding Yosemite communities participate in Gateway Expressions, a youth art contest and exhibit at the Ansel Adams Gallery in Yosemite Valley. Gateway Expressions is one way that Yosemite is working toward...

Wildlife biologist Sarah Stock, who is an ornithologist specializing in owls, has worked in the Wildlife Management branch of the Resource Management & Science division in Yosemite National Park since 2006.

An inside look into how Yosemite and Torres del Paine National Park (Chile) work together to share knowledge and solutions to challenges they have in common.

Ranger Karen Amstutz introduces the Parsons Lodge and Jay Leeming.

This video features just a few of Yosemite's 30 different youth and educational programs, which include Junior Rangers, wilderness expeditions, college internships and much more! These programs focus on instilling a deep appreciation and...

Traffic, usually considered an urban problem, has been an issue at Yosemite National Park for a long time. While the park is sometimes shut down to all traffic because of forest fires, when it reopens, hundreds of cars come back to enjoy...

The granite monolith of Half Dome is recognized throughout the world as an icon of Yosemite National Park. Thousands of visitors hike to the summit each year, rewarded with spectacular views and an experience that is not easily forgotten.

Park Ranger Shelton Johnson talks with students about how he fell in love with national parks and became a ranger. These students are participating in a week-long program offered by NatureBridge's Yosemite Institute campus. (2:08)

Every spring, both visitors and locals look forward to the opening of the Tioga Road, a high-elevation pass that crosses Yosemite National Park. Get a glimpse of what it takes to clear snow and ice from a section of the highway known for...

Yosemite's bears are adept at finding your food! This short, subtitled (no audio) video provides an overview of how you can protect bears while visiting Yosemite. (4 minutes, no audio)