1. Environments along the Lewis and Clark Trail Philip J. and Carol A. Gersmehl New York Center for Geographic Learning

2. Great Plain rivers – “a mile wide and an inch deep”

3. Prairie waterfowl

4. The Missouri in central Montana

5. Near the headwaters – forests and sedge swamps

6. Mountain stream rushiing toward the Pacific Ocean.

7. Clark Fork flowing toward the west

8. Columbia River through the lava plateau of central Washington

9. Columbia River through the Coast Range of mountains.

10. Repeat, looking at the land

11. Hardwood forests near the Mississippi River.

12. European settlers’ culture made extensive use of wood.

13. Scattered trees and grasses near the margin of the grassy Plains.

14. Grasslands of western Dakota.

15. Bison in western Dakota.

16. Badlands near the border between Dakota and Montana.

17. Forested slopes near the Continental Divide.

18. Lava plateau in central Oregon/Washington.

19. Side stream waterfalls and lava plateau “fenceposts”

20. Rainforest near the Pacific Ocean.

21. Fort Clatsop, where Lewis and Clark overwintered.

22. Fog-bound Oregon beach.

23. What they did (and did not) see.

24. Hailstorm on the Great Plains.

25. Nebraska Sandhills – could they have crossed this?

26. Really high mountains in Wyoming – could they have crossed this?

27. Barren salty desert in Utah – could they have crossed this?

28. Deep canyon in southern Utah – could they have crossed this?

29. Death Valley in California – could they have crossed this?

30. High Sierra in California – could they have crossed this?

31. What they went through: a GIS-based Summary