On April 8, Swiss climber David Lama and Austrian alpinist Dani Arnold arrived in Alaska for the first time in their lives. By April 10, they were on Buckskin Glacier in the Alaska Range. Beginning at about 2 a.m. April 12, they were on their way up Moose's Tooth, a 10,335-foot peak considered one of the more difficult climbs in the range.

The climbing due headed up an east-face route that no one had ever attempted before. And by the early morning of April 14, having successfully completed the climb, they were back at base camp.

In two days, the two men had created, on the notoriously difficult east face of the mountain, a new route now dubbed "Bird of Prey," joining other uniquely named lines up the Tooth like "Ham and Eggs" -- the mountain's most popular route, which well-known outdoors writer Jon Krakauer was among the first to ascend in 1975 -- and "Dance of the Woo Li Masters."

Find out how they did it: On one of Alaska's most difficult peaks, climbers find sweet spot