This is the third time summiting Whitney on a day hike and first time combining both Muir and Whitney. I learned a little each trip as each one is different. Everyone is a little different, but the altitude at Trail Crest and above makes a difference.
To get adjusted a little, I set up camp at Horseshoe Meadow Thursday the 2nd, loosened up a little with a hike to Trail Pass and then camped the night. Place was pretty empty and Temps were a good 8-10F below what was predicted, so it was chilly and below 30F even though forecast low was 38F. Hiked to bottom of switchbacks of Cottonwood Pass the next day and then headed to Lone Pine for a good (albeit short) nights sleep.
Started at 3 am with first break at OutPost Camp. For an October Day, the trail was pretty busy. I believe all 100 permits were used. Anyway, slogged up past Mirror Lake and since it was still dark I got temporarily lost by following someone else. Fortunately we were only 10-20 yards off the trail and didn't venture too far to the right. Made it to Trailside Meadow and filtered some water there as the TrailCamp Water is a little dicey. Trail Camp was really busy and full with people just getting up. It was like a small town. It was nice to see that there were not a lot of Wagbags around. Stayed amused by counting all 97 switchbacks. I did not have microspikes and some of the spots particularly at the cables and above were packed down ice and pretty slippery. It did not melt at mid-day on way down and of course there was no water to filter as it was frozen. saw everything from people in sneakers with no poles to a guy with $200 Crampons
It was pretty chilly at Trail Crest and the forecast winds of 5 mph were a lot higher in some spots. I have not climbed Muir before so I was looking for the turnoff by the big rock. It was pretty easy to find and there are a number of scramble areas to the base of Muir. I took a copy of the climbing route from this excellent site and followed the BLUE line up. I thought it was a little dicey in a few areas like the left across an open face by the chimney with no hand holds. Other than that, just be careful. The views were great with a clear line to the switchbacks. Got back on the trail and decided to do a 2 for 1 since I felt pretty good. It's still a good hike to the Whitney summit and unfortunately for me I ran out of water before hitting the summit. This made for a splitting headache on the way down even after I tried to rehydrate at Trailside Meadow. Anyway, made the summit and then headed back down. The pounding the feet and legs take from the granite from above Mirror lake to Lone Pine Lake takes it toll on a day trip. The total time was a little under 15 hours.
Met a lot of great people; some ultra athletes, others just hiking enthusiasts.
A few suggestions for those considering the Day Hike. Altitude affects people differently, but don't underestimate it. There were at least 6 people I ran into that were either too sick to make it past the switchbacks or puking and having to turn around. These aren't couch potatoes either; one super girl recently finished Pikes Peak marathon with no issues. So take it seriously and hike or camp around a little at 10K or above. I underestimated the water needed above TC for a 3rd time now. That's not happening again as dehydration and altitude don't mix well. And finally weather changes rapidly, so plan for the unexpected like downpours on 0% chance rain forecast or high winds when the forecast is 0-5 mph....Both happened.
The effort and planning are definitely worth the views, people, and overall satisfaction....Hope to post trip #4 next year
Muir Route 
