Firehole Canyon, above the confluence of the Firehole and Gibbon rivers, is home to rapids, flats, cascades and pools. And it is home to the 40-foot Firehole Falls and exposed lava flows 800 feet thick. Yet the real reason for this 2-mile detour is the swimming hole. It is one of only two safe, and legal, swims in Yellowstone! (Boiling River, near Mammoth Hot Springs, is the other.)
Pack drinks (alcohol is prohibited) and snacks as well as water shoes and towels. Wear your swimsuit to the river; there are toilets but no dressing rooms. Cliff diving is illegal. Parking is limited.
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