Mount Brooks, South Summit, East Ridge. Scott Gill and I climbed the east ridge of Mount Brooks to the south summit on June 29. This is a new route. The climb consisted of endless hours of post-holing in soft, unconsolidated snow. The final 75 meters, however, were a knife-edged ridge with spectacular exposure on both sides. It took 9½ hours to reach the summit from our camp at 6300 feet on the Brooks Glacier.