So I got divorced a few months ago and I'm now dating a woman who is an extreme athlete and loves to do active outdoors things for entertainment. I'm 62 and 187lbs and she's 53 and 140lbs and keeping up with her has been a little tough since she trains 6 days/week and sometimes twice a day with a personal trainer and does Crossfit competitions and can pick me up in the air like I'm a sack of groceries. She's an experienced hiker and me...not so much, but I am in pretty good shape from lifting weights several days/week, boxing class, dance class, and mountain biking. Anyway in July were going on a whitewater rafting trip in the Royal Gorge and hiking to the top of Pikes Peak the next day which is over 14,000 feet. We will be taking a shuttle down but any ideas on the best way to get in shape for that hike and altitude.