In June 1999, I went with my friend David Hung to Yosemite to hike Half Dome. We drove there in my 1969 MGB and nearly froze to death, but not once did Dave complain. Tough guy.
We met some of his friends there and camped overnight at Wawona in sleeping bags out in the open. Then, we hiked to the top and back, including ascending the final stretch which entailed clinging onto steel cables to pull ourselves up. Fortunately there were leather gloves available in this area just for this purpose. At the top of the rock, we had lunch and waited for the others to come up.
The whole hike was about 16 or 17 miles and I seem to recall it taking 9 hours. Or maybe it was 12; I forget. In any case, it was great to hike up an icon of one of the seven natural wonders of the United States.