Ellery Lake Falls is at the top of Tioga Pass Canyon and east of Ellery Lake by the eastern entrance to Yosemite. There are campgrounds at Ellery Lake in the Inyo National Forest. The historic mining ghost town of Bennettville in the area is worth a visit. The falls can be viewed from several pull offs on the Tioga Pass Canyon Road.
The World of Waterfalls has been to this waterfall, which you can read about here.