We were up on the Half Dome trail on May 19, which was toward the end of the long hot spell, so rivers were raging. I noticed a large sloping waterfall down Tenaya Canyon that I'd never seen before, and shot a couple of telephoto shots of it. Being in a mostly inaccessible part of Tenaya Canyon (at least when the water is running), this "from a distance" shot may be the only way to see it like this:
http://www.pbase.com/roberthouse/image/97758181/original
If you look closely, you can see a few trees nearby to give you some perspective of how huge this cascade is (shot from 2 miles away); it also shows why Tenaya Canyon is considered so inaccessible and dangerous, if you look at the surrounding area. People get lost, trapped, injured, or caught in flash floods hiking that canyon, and the riverbed is the only real trail through much of it, so if the river is full your choices are limited.
Anyway, the Pywiack Cascade (coming down in the area past Cloud's Rest/ Mt. Watkins) was new and interesting to me, so I thought I'd pass the photo along.
The rest of that album shows some of of the rivers and falls as they were during that hot spell...huge and impressive; but apparently they have subsided a lot with the cooler weather.
http://www.pbase.com/roberthouse/river
Gary
Yosemite Photo Galleries: http://www.pbase.com/roberthouse/yo