Elevation: 11,087 ft
This peak is not in the book. Judi Steciak and Carl Hamke provided the following route information. See their article on the Missing Eleveners in the Climbing History Section of this site.
Window Peak is located just under a mile SSE of Peak 11161. USGS Easley Hot Springs
North Fork Big Wood River [(A)(9)(a) on Page 241]
East Ridge, Class 2+
Follow the trail up the drainage until it crosses the 8,600-foot contour. Contour southwest across the West Fork of the Big Wood River and take advantage of herd paths to reach a flat area at 9,240 feet. Head west until reaching the 9,600-foot contour. To maximize the length of a pleasant ridge walk, stay as far east as practical as you climb north up the steep South Face to reach the East Ridge. Follow the ridge to the summit.