Caution: the unmaintained and unmarked Knapsack Pass trail exposes experienced hikers to slippery scree and steep snow (possibly icy), best hiked in late summer using a good GPS device, map, and trekking poles. Mount Rainier rises to 14,411 feet elevation, seen here from the headwaters of Cataract Creek in Mist Park, along the Spray Park–Knapsack Pass Loop trail, in Mount Rainier National Park, Washington, USA.
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