The lakes of the Mammoth Lakes Basin, reached by Lake Mary Road off Highway 203 southwest of town, are popular for fishing and boating in summer. First comes Twin Lakes, at the far end of which is Twin Falls, where water cascades 300 feet over a shelf of volcanic rock. Also popular are Lake Mary, the largest lake in the basin; Lake Mamie; and Lake George. Horseshoe Lake is the only lake in which you can swim.
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