by zippetydude » Tue Sep 17, 2013 5:39 pm
A couple of things that might help. First, I'm guessing you're pretty fit since you have done Whitney multiple times. You probably know how long it took you from Whitney Portal to the summit. Since Skyline takes about the same amount of time, subtract the number of hours you plan to spend on the trail from 8:00 (the time the tram opens) and that's probably the earliest you want to start. Let's say Whitney takes you 5 hours - then you'd probably wait til 3:00 or so. You don't want to do the whole trail in the dark.
BTW the tram parking lot doesn't open until 5:30, so unless you leave a car there the night before you'd have to either take a cab back, hitchhike, or start at around 6:00. That would put you in the sun the whole time and might get kinda hot.
If you can scout the trail up to the picnic tables the day before it will make finding your way in the dark somewhat easier the next morning.
z