Long's Peak is one of Colorado's most popular fourteener peaks. The Kiener route is a classic mountaineering adventure. It is named after Walter Kiener who first climbed the route in 1924 and ended up losing his best friend, his fingers and toes to frost bite. It is a mixed climb of ice/snow and rock. Begin at the standard Long's Peak trailhead up to Chasm Lake and the base of the east face. Mills Glacier is a permanent glacier located at the base of the east face. Head up Lambs slide which is a couloir along the southwest side of the east face. This couloir is very prone to avalanches in early June. The snow turns to ice by August. Once at the top of Lambs slide traverse right along exposed ledges. Many people rope up here with low 5.1 climbing. There are a couple of pitches with mixed climbing. The most difficult climb is rated 5.4. Descend down the north face also known as the cables where there are rappel bolts. You could also descend the keyhole hiking route but this is long. Bring an ice axe, crampons, light rack, long rope, runners, slings and be prepared for quickly approaching storms.