Based on my calculations, I'm going to carry 4L from the TH, again knowing I'll probably be out by LP Lake on the return.
I want to make sure that I am understanding what I am reading: Are you going to carry 4litres of water for a day hike on the Whitney Main Trail?
Carrying a filter would be a
lot lighter than carrying all that water, as you will be crossing available sources all the way to the foot of the switchbacks (which offers a huge source at Trail camp)
If one is concerned about the 1 minute it takes to filter the water, I would pose that the extra load of all that water would definitely slow one down much more.
On the very safe side, 2Litres would be more than enough with all the refill opportunities(overkill) up to the switchbacks
