Three of us attempted Tenaya Canyon yesterday (Wickett, Ross and I).
We started at Tenaya Lake/Sunrise Trailhead and entered at Pywiack Cascades. Took us 6 hours to reach the bottom of the slabs. We are pretty sure we started the descent too close to Lone Boulder and the Cascades (stupid Beta!). So we ended up setting up three rappels-anchoring on a two different trees and a jutted out rock.
Ross (an 18 year awesome climber) free soloed the entire thing and set up the anchors for us. Exposure was huge!
Finally after reaching the bottom of the slabs at 2 pm and then making some progress to the Inner Gorge, Wickett realized he usually is at that point at 10 am. This meant we would probably finish at 10 pm and include wet rappels at or just before dark.
So we turned back. No, not up the Pywiack Slabs! We headed up Airplane Gully. This was quite a climb and involved a few climbing moves requiring exposure that scared me to death. At some point we ran out of water so that didn't help either.
We reached the Airplane Engine and not long after that finally reached mostly level ground. We made it to Olmsted Point at 6:50 and waited 20 minutes for our ride.
I have a ton of pictures but won't be able to post until sometime later this week. I will also post a more detailed trip report.