About Castle Lake
On the map, Castle Lake belongs to the Wild Basin section of Rocky Mountain National Park, at 11,142 feet on the east side of the Continental Divide. In this guide it is treated as a hard lake.
The setting is remote Wild Basin. The approach from Wild Basin TH is 7.0 miles one-way and belongs in the hard tier for this guide. Wild Basin is a deep southeast corner of the park, with waterfalls, long forested approaches, and many high lakes. The distance and setting make this a plan-ahead destination, not a casual lake stop.
NPS hiking and wilderness tables list Wild Basin routes to Ouzel Falls, Ouzel Lake, Thunder Lake, Finch Lake, Pear Lake, and Sandbeach Lake, making this southeast corner one of the park's densest lake-and-waterfall regions.
Route Map
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