Botanist Edwin Bingham Copeland and partner E. N. Henderson were the first climbers known to reach Junction Peak's summit, on August 8, 1899. They pioneered the class 3 South Ridge route, following the exposed ridge from Diamond Mesa to the top of Junction. Over the course of nearly a century, several more class 3 and 4 routes were established. The first winter climb was made by the West Ridge, culminating on March 21, 1973. The first technical climb recorded on Junction was the grade III 5.7 North Buttress route.