On May 11, 1805, Lewis and Clark encamped in the area called the Pines past York Island, across the Fort Peck Reservoir, where they saw enormous herds of elk, buffalo, deer, and antelope and the first pine trees they had seen on the upper Missouri since leaving Fort Mandan. After many miles of relatively bare hills and gullies, the pine-covered summits and dwarf cedar stood out strongly. That day Captain M. Lewis also recorded that Joseph Field had shot a brown bear that turned on him, and after the party found the animal they killed it with two shots through the skull, an encounter that Lewis said intimidated them because such bears were so hard to kill. Lewis also noted the troublesome greasewood, describing its firm, stiff wood and many long, sharp, strong, woody-looking thorns.