2.2 miles round trip, 1.5 hours. Easy to moderate difficulty and elevation gain. All according to the Yosemite Guide.
When we got to the top of this rounded dome on the top of the south side cliff of Yosemite valley we were amazed at the 360 degree view of Yosemite National Park including all of the Sierra Nevada range. Most all of the main points of Yosemite valley were in view, including Yosemite Falls, Half Dome, Mirror Lake, Vernal and Nevada Falls, about 3,000 feet below us.
On the top of this dome, there stood an ancient and twisted Jeffrey Pine tree that had withstood crazy weather and poor soil. I don't know if it's there any more, but it's worth the hike to get a picture of that amazing tree.
Our only son, at the time, was a baby in our backpack, so I was not concerned about the danger of this place. As an adult, I felt fairly safe because there was no steep edge to fall off of. But be aware that there are inherent dangers in this location.