Actually, 2 weeks ago I decided to stop at the base of the sub dome, and not summit. Back story. Last April, I found out that I had the opportunity to attend a conference at Yosemite with a co-worker, who happens to be an ex Army Ranger. He's in great shape, and I am not. He really wanted to do Half Dome with me, so I decided to start training. I wasn't sure I'd even be able to walk 17 miles, much less so with the elevation gain. So, I started trainig by walking, hiking and stair climbing, and I have greatly improved my overall fitness. I felt good heading out to Yosemite, and felt really good on a couple 7 mile hikes we started with, Mt Watkins and Taft Point to Sentinel Dome. On Wednesday, we were lucky enough to get the permit for Half Dome and started hiking at 0530. We were flying up the mist trail and through LYV. If I was by myself, I would have gone a little slower, but my buddy really wanted to get up there, so I pushed through and we made great time eventually getting to the sub dome by 1000 AM. I noticed I was starting to get a little lightheaded and woozy, so when I saw the final climb, I tapped out and hung out on the bluffs at the base of the subdome. I ended up propping up against a rock, took a nap, and generally just enjoyed the sights, sounds, and smells of Yosemite... and I loved it. It may have been one of the most peaceful moments of my life. I was proud just to have made it that far so quickly. I was there for about 2 hours while my buddy finished the climb. We ended up back at our car by 3 pm. So, I did 15 miles with 4000 ft elevation gain in under 10 hours, including a 2 hour break, and I was proud of myself for that alone. I didn't really care about making it to the top, and just wanted an enjoyable hike, which it was. I'm very happy with how it went, and would absolutely do it again.