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The ExpeditionGreat Falls and Portage
Route Survey

Sulfur Spring - Closeups

Bison Spa

"We saw a herd of buffaloe come down to water at the sulpher spring this evening," Lewis recorded on the eighteenth of June, 1805. "I dispatched some hunters to kill some of them, and a man also for a cask of mineral water."

The vegetation on the banks today might not have been present when Lewis passed by. The trampling of buffalo herds watering at the hole would have kept it from growing as thickly as it appears above, if at all.

The bison, of course, would have contributed one or two more odors to the mix.

--Joseph Mussulman and Richard McCourt

Route Survey

From Discovering Lewis & Clark ®, http://www.lewis-clark.org © 1998-2014
by The Lewis and Clark Fort Mandan Foundation, Washburn, North Dakota.
Journal excerpts are from The Journals of the Lewis and Clark Expedition, edited by Gary E. Moulton
13 vols. (Lincoln: University of Nebraska Press, 1983-2001)