Posted Sunday, June 30, 2002; 8:31 a.m. EST

VIRGINIA
Monticello, at Charlottesville
Thomas Jefferson's estate will be the site of the inaugural bicentennial event on Jan. 18, 2003. The exhibition "Framing the West at Monticello" opens two days earlier, re-creating Jefferson's Indian Hall, where he displayed artifacts. The estate has worked with Native American artists to re-create lost objects (www.monticello.org).

KENTUCKY/INDIANA
Falls of the Ohio
It was here that Lewis and Clark formed their partnership and recruited and enlisted many of the corps members. The second signature event of the bicentennial will be held in October 2003, and there will be activities throughout the bicentennial (fallsoftheohio.org).

MISSOURI/ILLINOIS
St. Louis Area
The Museum of Westward Expansion, at the Arch, has exhibits and a new IMAX movie. Nearby St. Charles, Mo., where the corps picked up supplies, has a small museum (lewisandclarkcenter.org). Across the river in Hartford, Ill., a starting line, the Lewis and Clark Illinois State Historical Site, opens in September 2002.

SOUTH DAKOTA
Yankton
The Lewis and Clark Visitor Center at Calumet Bluff will have its fifth annual festival Aug. 31-Sept. 1, 2002, with Yankton Sioux dancers (lewisandclark200.gov).

NORTH DAKOTA
Fort Mandan, Washburn
The corps wintered there in 1804. Open year-round, the North Dakota Lewis and Clark Interpretive Center houses a collection of Karl Bodmer watercolors, considered the most reliable eyewitness account of Upper Midwest Indian cultures. And you can try on a bearskin (fortmandan.com).

MONTANA
Pompey's Pillar, near Billings
This 200-ft. stone outcropping, a national monument, bears the only visible evidence of the expedition along the entire trail. On the return trip, Clark carved his name into the rock on July 25, 1805 (pompeyspillar.org).

Great Falls
The corps camped in the area for about a month while portaging around five sets of falls. The Lewis and Clark National Historic Trail Interpretive Center has year-round activities and exhibits, pictured at left. In summer, visitors can participate in the river camp and learn how to make moccasins, scrape a hide and navigate like the explorers (www.fs.fed.us/r1/ lewisclark/lcic.htm).

IDAHO
Nez Percé National Historical Park
The tribal park in Spalding offers exhibitions and artifacts of the Nez Percé tribe and the Lewis and Clark expedition, including Canoe Camp and Long Camp, where the explorers had to mark time waiting for the snow to thaw. (www.nps.gov/nepe)

Salmon, Lemhi County
In the land of Sacagawea's birth, Lemhi Pass represents the stunning westward viewpoint where the men realized that there was no short portage to a navigable river. It is an area virtually unchanged from 200 years ago. The Flag Unfurling site just a few miles away is where Lewis, desperate to befriend the Shoshone to procure horses, met Cameahwait, Sacagawea's brother (id.blm.gov/recreation). A Sacagawea interpretive center is scheduled to open in May 2003 (salmonidaho.com).

OREGON
Fort Clatsop, Astoria
The corps spent the wet winter of 1805-06 here, learning from the Clatsop Indians. They made buckskin clothing and prepared for the trip home. This national monument, with a replica of actualthe corps's fort, offers educational programs and events throughout the year (nps.gov/focl).

WASHINGTON
Fort Walla Walla
Clark traded his sword here for a horse. Every June the Fort Walla Walla Museum is host to Lewis and Clark Days, commemorating Indian and military history (fortwallawallamuseum.org).