On Saturday morning Matt, Louis, and I drove to Pole Creek Trailhead for a weekend of ski mountaineering in the Three Sisters Wilderness and hopefully a summit of Middle Sister. Middle Sister (10,047') is the shortest of the Three Sisters, located in Central Oregon. The Hayden Glacier North Ridge route starts from Pole Creek Trailhead near Sisters, Oregon. It's about 14 miles round-trip, so it makes a nice overnighter or a very long day trip. The trek starts off on Pole Creek Trail # 4072 and then follows Camp Lake Trail # 4074 before heading above treeline West toward Middle Sister.