We took a drive to Glacier Point. We were able to see people on top of Half Dome and rock climbers making their way to the top of Half Dome. On the way back to our rig, we stopped at El Capitan and watched some of the rock climbers there.
If you enlarge the picture, you can see the people on top of Half Dome.
There are 2 rock climbers in the bottom right side.
These climbers were climbing El Capitan. They had to spend the night before arriving at the top.