The expedition navigates over mountains, down rivers, and through forests to finally reach the Pacific Ocean. Explore the dates below for big events in 1805.

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February 11
—Sacagawea gives birth to a baby boy, Jean Baptiste, nicknamed "Pompy." To read more about Pompy, click here.

April 7
—The "permanent party" consisting of Lewis and Clark and thirty-one others leave Fort Mandan and continue west. The remaining people return to St. Louis with letters to their families and discoveries for President Jefferson. To read about the package sent back to President Jefferson, click here.

April 29
—Lewis and another hunter kill a grizzly bear. To learn more about the grizzly bear and read journal entries about bear encounters, click here.

May 14
—Charbonneau lets go of the boat rudder and almost overturns the boat. Sacagawea rescues most of the items washed overboard and impresses Lewis and Clark with her calmness. Read details of the day's events by clicking here.

June 13
—Lewis arrives at the beautiful Great Falls of the Missouri. Read Lewis and Clark's journal entries for the Great Falls by clicking here.

July 27
—The expedition reaches the Three Forks of the Missouri. To learn more, click here and to see Clark's map of the area, click here.

August 17
—The expedition meets a group of Shoshone Native Americans, including Chief Cameahwait, Sacagawea's brother. Sacagawea helps the expedition trade for horses. Read more about the Shoshone by clicking here.

August 30-September 22
—They cross the snowy Bitterroot Mountains. Several horses fall and are injured and the expedition almost runs out of food. Read more about this perilous journey by clicking here.

August 25
—Lewis's shipment of artifacts, animals, and writings arrives at Monticello, Thomas Jefferson's house. Most of the objects sent to Jefferson have disappeared over the years, and the only original Lewis and Clark object is a pair of Elk Antlers (Click here to see them). Learn about the quest to find these objects by clicking here.

September 20
—They meet a group of Nez Perce Native Americans who give them fresh salmon and new clothes. To learn more about the Nez Perce, click here.

October 6
—The expedition builds dugout canoes and paddles down the rapids of the Clearwater and Snake Rivers. One boat hits a rock and sinks, along with most of their food. To learn more about the rapids and see a picture, click here.

October 16
—The expedition reaches the Columbia River.

November 18
—The expedition reaches the Pacific Ocean. To find out what words Clark wrote in his journal on this day, click here.

December 7
—They settle down for winter at Fort Clatsop. To take a virtual tour of Fort Clatsop, click here.

1806
The explorers return home to St. Louis, Missouri. Explore the dates below for big events in 1806.

March 23
—The expedition leaves Fort Clatsop and heads home.

September 20
—The Corps of Discovery arrive at a frontier village, the first white settlement they have seen since 1804. To read a description of the occasion, click here.

September 23
—The explorers arrive back in St. Louis. Click here to read and listen to Lewis's announcement of their return.

Continue to see the trail today.

Congratulations, you have found one of the objects for the specimen box!

In 1805, Lewis and Clark ran up against the ferocious grizzly bear. Click here to add the bear to your specimen box or click here for a printable version.