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Follow the Pawnee Pass Trail #907 as it climbs gradually for 2 miles, through wooded terrain, into the Indian Peaks Wilderness, past Long Lake to Lake Isabelle, which sits just below the tree line. At Lake Isabelle, follow Isabelle Glacier Trail #908 as it forks left from the Pawnee Pass Trail and continues along the north side of Lake Isabelle to the source of the South St. Vrain Creek - Isabelle Glacier. The Isabelle Glacier Trail is a difficult social trail, climbing over talus and passing through swampy areas on its way to the upper lake. Beyond the lake, there is a narrow, but constructed switchback trail up a somewhat unstable steep, rocky slope, which may be hidden under the skirts of the glacier early in the summer. The Isabelle Glacier Trail ends finally beside Isabelle Glacier in a very steep-walled cirque basin framed by Shoshone, Apache, and Navajo Peaks. Length: Long Lake TH to Long Lake - 0.2 miles; to Lake Isabelle - 2.1 miles; to upper lake - 3.7 miles; to Isabelle Glacier - 4.2 miles. DISTANCES ARE ONE-WAY.
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