One step at a time, the trail-running community is constantly moving upward. In recent years progression has vaulted forward, with runners blending inspiration from the world of alpinism, rock climbing, and running and tackling technical terrain in a way we’ve never seen. Follow along as Emma Cook-Clarke and Jesse McAuley dig deep on the west peak of Ch’ich’iyúy Elxwíkn, the Twin Sisters (or the Lions), an iconic Sea to Sky trail.