This was such an epic route, so fun! I started just before 8AM and it was a beautiful run down into the valley floor. It was already getting hot by the time I arrived in the valley. Tons of gnats on the lower part of the climb up to Yosemite point. I had to check my watch closely when I got to the to of the switchbacks near upper Yosemite falls, because I've made a wrong turn in that area before and the trail is not always clear in this section at the top. The descent down from upper Yosemite falls is much more technical than 4 mile trail and I found it hard to go fast. There was a lot of slick rock covered with sandy soil, which made it very slippery. I brought my water filter and refilled in the creek at the top of the falls and then in the Merced river after descending. It was hot on the last section climbing up 4 mile trail and the gnats were relentless again, I think I must have eaten at least 5! I saw a rattlesnake about half way up the four mile trail. I finished in 6 hours 14 minutes, just before 2pm and enjoyed a cold soda from the glacier point store! It was a great day on the trails.