by AlmostThere » Thu Apr 17, 2014 5:30 pm
No.
Mind you, I know people who do 20+ mile day hikes... but they hike three days per week and go for 6+ day backpacking trips, and never have a problem. You don't remember it being too difficult to do Half Dome, but I can guarantee that "years ago" has fogged your memory.
What you are attempting is Half Dome ( 5,000 feet of gain over 8 miles, with some wicked terrible steps crowded with tourists most of the day) followed by 4 miles back to Nevada Falls then 8 miles with 2000+ feet of loss followed by 3500+ feet of gain to Glacier Point in the FULL AFTERNOON SUN WITHOUT SHADE followed by four and a half miles down some knee-wrenching switchbacks followed by two miles of limping back to Curry Village or Yosemite Village day use parking.
You will kind of die out there, is my prediction. 9,000 feet of gain with roughly half of the hiking in full sun on granite and decomposed granite? If the elevation doesn't slow you down, the heat will. After 1 pm you can bake cookies on the granite. Uh uh, not me. You couldn't pay me.
Pick one trail and go up in the early morning, leaving a nice easy downhill for the hottest part of the day, and do one of the other trails the next day. Your buddies will thank you. If you do Half Dome, don't forget your permit.