Brower's Spring

He had visited the site in 1895 and buried a copper plate nearby upon which the name of the river and the date were engraved.

[1] The spring is 100 miles (160 km) further than the spot Meriwether Lewis reported in 1805 as the source of the Missouri above Lemhi Pass on Trail Creek.

Though the copper plate has not been located, the site of Brower's Spring is believed to be at about 8,800 feet (2,700 m)[2] on the north fork of where Hell Roaring Creek divides near its source.

Hell Roaring Creek flows west into the Red Rock River, which flows through Upper, then Lower Red Rock Lakes, west through Lima Reservoir, and then northwest into Clark Canyon Reservoir.

[3] Brower's location is just below a ridge extending to the southeast from Mount Jefferson 2 miles (3 km) to the northwest, and is 1.6 miles (2.6 km) southwest of the Sawtell Peak Observatory in Idaho, about 20 miles (32 km) southwest of West Yellowstone, Montana, and about 1,600 feet (500 m) southwest of the nearest point on the North American Continental Divide.