A highlight of the park, Yosemite Falls (2,425 ft) is one of the world’s tallest waterfalls, and is actually comprised of three separate falls: Upper Yosemite Fall (1,430 feet), the middle cascades (675 feet), and Lower Yosemite Fall (320 feet).  Depending on snowpack, it generally flows from November through July, reaching a thundering climax sometime in May.  

You can see Yosemite Falls from numerous places around Yosemite Valley.  A one-mile loop trail leads to the base of Lower Yosemite Fall (the eastern side of the loop, from the shuttle stop to the base of the waterfall, is wheelchair accessible).

The Upper Yosemite Falls Trail

It's also possible to hike to the top of Yosemite Falls as a vigorous, all-day hike up the Upper Falls Trail. Logging in at just 3.2 miles (5.1 km) each way from the Valley Loop Trail to the top of the uphill, this trail nevertheless gains about 2,600 feet and catches first light and is in full sun until mid-afternoon. During the summer, it is essential to start early, carry water and try to get as much of the uphill out of the way before it gets too hot.

From the top, it's a short but exposed hike down to the lookout with a steel railing by the edge of the Upper Fall. Hikers with a bit more energy can continue on another mile to Yosemite Point, a dramatic viewpoint with great views of the entire eastern end of Yosemite Valley.