On June 4, 1805, while Captain Lewis was exploring Maria's River, Captain Clark explored the Missouri upstream from the Carter Ferry site with a small party that included Sgt. Glass, the Field brothers, G. Shannon, and York. Clark noted a cold night, snow in the mountains to the south, which were named the Snowy Mountains and are now called the Highwood Mts., and a strong, rapid current as the river continued west of south. Believing it unnecessary to go farther because the river was flowing from the right direction, the party killed three grizzlies, crossed the plain to the valley of the Teton River, also called the Rose or Tansey, and camped where the little river cuts through the ridge. Clark inscribed his name on a large cottonwood there, the men feasted on venison for dinner, and the next morning they proceeded down the Teton to their main camp at the confluence of the rivers.