July 28, 1784 - Sacagawea born in a Agaidiku tribe of the Lemhi Shoshone, current day Idaho, as daughter to a chief.
Somewhere about 1800 - Sacagawea was captured and taken by the Hidatsa Indians during a battle.
Somewhere about 1801 - Was sold as a slave to Toussaint Charbonneau, a French Canadian trapper, who later takes her for a wife.
November 4, 1804 - Lewis and Clark expedition encounters Hidatsas tribe. Sacagawea's husband is hired as an interpreter. Sacagawea was considered as a helpful hand and an interpreter of the Shoshone language.
February 11, 1805 - Sacagawea gives birth to her first child, Jean Baptiste.
June 11-17, 1805 - Sacagawea becomes extremely ill with a fever. Clark helps saving her life.
August 8, 1805 - Sacagawea recognizes Beaverhead Rock and the headwaters of the Missouri river the home of her tribe, the Shoshones.
August 17, 1805 - Discovery of a Shoshone tribe. Lewis and Clark negotiate with the tribe for the horses. Sacagawea discovers that Shoshone chief Cameahwait is her long lost brother. The meeting place was named Camp Fortunate by the expedition.
August 31, 1805 - Shoshone guide sets wit her expedition, along with 29 horses and a mule.
September 9, 1805 - Travelers Rest, a place where Lewis and Clark prepared the expedition for the mountain crossing.
September 22, 1805 - The expedition crosses the mountains after nearly starving to death.
October 16, 1805 - Lewis and Clark reach the Columbia River.
October 18, 1805 - Clark spots Mt. Hood. That serves as a proof that they on the right path to the Pacific Ocean.
November 7, 1805 - Clark sees the ocean in the distance. With excitement he writes his famous words in his journal entry: "Ocian in view! O! the joy."
November 24, 1805 - Sacagawea suggest the crossing path to the south side of the Columbia River. Expedition makes their winter camp after crossing it.
March 23, 1806 - Expedition leaves Fort Clatsop, and the expedition begins their journey home.
July 25, 1806 - Sandstone outcropping was named Pompy's Tower, after Sacagawea's son, nicknamed Little Pomp. Clark inscribes his name and the date.
August 14, 1806 - The expedition returns to the Mandan village. Charbonneau, Sacagawea, and Jean Baptist decide to stay, parting ways with the Corps of Discovery.
December 20, 1812 - Sacagawea dies probably at age of 25 at Fort Manuel Lisa due to complications of a putrid fever. William Clark, assumes custody of Jean Baptiste, as well as her daughter, Lisette.
April 9, 1884 - According to native legend, she crossed the Great Plains and married into a Comanche tribe, then had returned to the Shoshone in Wyoming where she died.