Hi -

I am from Bay Area, CA and will be hiking whitney on September 3rd 2017. We got permit for the day hike. Currently as part of my training, I am able to do hikes as long as 18miles with a speed of 2mph to 2.5 miles/hr depending on the steepness on an elevation of 3500ft gain. I wanted to know how steep is whitney and wonder if it will be possible for me to maintain a speed of 2mph on an average?

we are planning to start hiking at 3am and is that a good time to start or is it good to start early?

Any input on these is appreciated.