Last year I hiked Mt. Ascutney with my good friend Judy. The details are fuzzy now but I think it took us six hours to hike the 2060 feet, 2.9 miles up, 2.9 miles down. 2/3 of the way down I experienced extreme muscle fatigue, of the clinical sense, my quadriceps would NOT contract. It took me a good week of wincing and limping and awful soreness to recover.
Far be it from me to turn down a challenge. I'm 35 pounds lighter this year, I'll pack smarter, and I will do it.