Experience
At a small museum in Telkeetna there was a model of Mount Denali. I was able to catch a talk by this gentleman who had climbed it five times and scores of others mountains in North America primarily. He was no longer doing “the big mountain” - I think he said his last climb was six years ago, but was still actively climbing. The stories were great. Love to hear from people who have expertise and are passionate about what they do.