I would disagree with your statement stating season hikers with extensive back country experience.
I was able to summit Whitney on my first attempt (day hike)I only came across two individuals that did not make the summit one a day hiker and one an over night hiker.
I've been hiking for about a year.
Briang191, how old are you, what do you do to stay in shape?
Steve I'm 35 and I use to run 5 days a week and hike on Sunday's. I suffered a foot and leg injury about 6 months prior to my Whitney day hike. I had to scale back and stop running. I only hiked once a week for my training for whitney. I gained about 15 lbs and wasn't in best shape. I've just recently got back into running during the week.
How do you determine if someone has extensive back country experience?