Lewis and Clark National Historic Trail
The Lewis and Clark trail is one of (if not the) longest trail to travel in the United States. The image above is of the Missouri River Headwaters which was one of my first stops on the trail while traveling across country with my dad in 2016. Cancellation stamps for this trail are found in great many places, many of which are off the beaten path and typical roadways used when traveling around the country. Collecting all of them will be a lifelong adventure.
Beacon Rock State Park
Bonneville Lock and Dam
Located in southern Washington State and Oregon - it's worth a few minutes to tour the aquarium and see the immensity of the dam and locks.
Cape Disappointment
Dalles Lock and Dam
Fort Columbia
This is also the site of the Lewis and Clark National Historic Park.
Fort Mandan Interpretive Center
Fort Union Trading Post
A historical site all to it's own and part of the Lewis & Clark Trail, you can see the full gallery here.
Fort Vancouver
A historical site all to it's own and part of the Lewis & Clark Trail. You can see the full gallery here.
Gateway to the Big South Fork
A small stop in Kentucky along the trail with a small interpretive area.
Great Falls, Montana
An extensive Interpretive Center for this area explored during the Lewis & Clark trail.
Harper's Ferry, WV
A historical site all to it's own and part of the Lewis & Clark Trail, you can see the full gallery here.
Gateway Arch National Park
A historical site all to it's own and part of the Lewis & Clark Trail, you can see the full gallery here.
Knife River Indian Villages
A historical site all to it's own and part of the Lewis & Clark Trail, you can see the full gallery here.
Lewis & Clark Boat House Museum
A small interpretive museum at the start of the Lewis & Clark Trail in St. Charle's Missouri.
Lewis & Clark SHS
A state historical site in Hartford, IL considered to be the exact start point of the Lewis & Clark Trail.
Locust Grove Historic House
A small interpretive center along the trail set just northeast of Louisville in a gorgeous estate house.
Missouri River Headwaters
National Frontier Trails Museum
Pompey's Pillar
Sioux City, IA Interpretive Center
Station Camp (Cape Disappointment)
Washburn, North Dakota Interpretive Center
Wheeling, WV
Although it isn't listed officially or has a stamp (yet), Lewis & Clark did pass through and there's a sign that proves it.