Gates of the Mts.
	Captain Lewis exclaimed: " this evening we entered much the most remarkable clifts we have yet seen. these clifts rise from the waters edge on either side perpendicularly to the hight of 1200 feet. ... the tow[er]ing and projecting rocks... seem ready to tumble on us. the river appears to have forced it's way through this immence body of solid rock for the distance of 5 3/4 miles.... I called it the gates of the rocky mountains."
			Lewis & Clark Trail - Montana
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