In 2013, Mills embeds with Expedition Denali, a group of Black mountaineers aiming to plant their crampons on the summit of the team’s namesake peak. Peppering their story with those of other Black adventurers, he makes the case that beyond those glacier-strewn Alaskan slopes, there’s a much bigger mountain to climb—one that hopefully bridges a racial gap in both outdoor participation and representation to create a more equitable and just outdoors for all.