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It took just 73 seconds for Mich Kemeter to cross the cliffs at The Rostrum in Yosemite National Park. Watch his daring walk, 800 feet in the air without a harness.

January, 2014: Although skiers in California are mourning the continued absence of snow, hikers and horseback riders in the Northern Sierras have reason to rejoice.

It is easy to meet the people of the Sierra, whether they play piano at a historic hotel or lead tours through limestone caverns or hold pow-wows.

Fire officials are now using a drone to help fight the Rim Fire near Yosemite National Park.

Some of the most exciting rivers for whitewater rafting in California flow from the High Sierra in Yosemite National Park.

Signs of Yosemite’s glacial past are everywhere. Follow these tips on what to look for and where to find them.

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Yosemite’s cliffs, domes, and valleys are products of powerful forces. Watch a video about the past and 2 remaining Sierra glaciers, Maclure and Lyell.

Yosemite’s traffic problem could be solved by using a combination of the park’s public transit system, and a walking/cycling trail system to get around.

A $1.3 million grant offered through the Yosemite Conservancy will fund nine new Youth in Yosemite programs. These programs, directed toward groups of low income, at-risk and under served children, will pair photography classes, hands-on internships and camping with lessons in ecology, geology and environmental stewardship.

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Want to be a better hiker? Look no further. Here are some backcountry secrets that separate average campers from true wilderness experts.

Yosemite National Park is home to many tall mountains, trails are often loose, steep and dangerous (with little or no room for error).

Yosemite's high mountain country means the air is dry and thinner. (There is less oxygen in the air.) Visitors who are coming from lower elevations will notice this, particularly when exerting themselves on a hike or other outdoor activity.

Also known as cougars, puma or panthers, these hunter mammals have all-over tawny-colored bodies with black-tipped ears and tails.

The most common wildlife you'll encounter during your Yosemite trip are members of the rodent family, which includes squirrels, chipmunks, gophers, and mice.

Our favorite hikes in two national parks south of Yosemite.

Here are just a few of our trustworthy favorite field guides to carry with you in the car and on the trail as you explore Yosemite's natural grandeur.

Take a minute to find out what some of Yosemite's famous place names mean, and you'll uncover valuable nuggets of the park's history

In early Spring, Snow Plants pop their bright scarlet heads up through the snow. "It looks like a neon red psychedelic asparagus."

To get a good look at evidence of rockfall in any season, just follow the easy walking trails that lead right up to base of the valley's famous waterfalls, including Yosemite Falls and Bridalveil Fall.

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A camping trip with President Roosevelt and Muir led to an explosion of wilderness protection across the country and a push to make Yosemite a national park.

Early tourists made the long journey overland to see its natural wonders, from the to the Mariposa Grove of giant sequoias and the views from Glacier Point.

Stephen Mather, the first director of the National Park Service, who decided that what Yosemite needed was a first-class hotel to attract wealthy, politically powerful, and celebrity clientele to the park.

Although you may not think much about it, the air quality in Yosemite National Park will have an enormous impact on your park vacation.

"Off the Wall" recounts the various ways that visitors have met unfortunate ends in Yosemite, one of America's most seductively beautiful outdoor destinations.

The soundscape of Yosemite is just as important of a natural resource to the park as its mountain peaks and rushing waterfalls.

The story of Mono Lake reflects the historical and political struggles between nature conservation and California's burgeoning urban populations.

Exploring Yosemite's great outdoors can be fun for all ages, as long as you take simple precautions. Make time before your trip to learn a little about the park's safety hazards, so that your vacation will be carefree.

Pay attention to the warning signs of dehydration and heat exhaustion, which can include thirst, dizziness, fatigue, nausea, headaches, muscle cramps, an increased pulse rate, and rapid, shallow breathing.

There are several things you can do to help avoid experiencing the most common problems at altitude.

Fun for kids of all ages, the park's junior ranger program lets your entire family get a lot more out of their Yosemite vacation.

Camping on the east side of the Sierra Nevada range lets you stay reasonably close to Yosemite National Park. National forest and other public lands let your family get back to nature at rustic campsites set beside pretty alpine lakes and in the Sierra Nevada foothills.

East of Yosemite's high country, on the other side of the Sierra Nevada, lies a wonderland of lakes and waterfalls, alpine meadows, and geological oddities.

If you want try your own hands at watercolor painting, photography, or journaling during your Yosemite vacation, there are plenty of opportunities for adults and children of all ages to do so.

If you want to learn about both the natural and the cultural forces that have made the park what it is, stop by the following modest museums and educational visitor centers.

Mule deer are the most easily spotted mammal in Yosemite National Park. They are easily recognized by the shape of their ears, which actually do resemble mules' ears

Summit not just mountains, but waterfalls and iconic granite rock formations also.