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).

It's also possible to hike to the top of Yosemite Falls as a vigorous, all-day hike.