William Clark (assuming you're talking about the Lewis and Clark expedition)
No, Lewis and Clark went by ships and wagons pulled by oxen.
sacajuwea
Meriwether Lewis was 29 years old and William Clark was 33.
There were 33 individuals on the expedition, plus Sacajawea.
on their expedition Lewis and Clark went to the upper Missouri River region.
The Lewis and Clark expedition to fined a rout to the pacific ocean was the only expedition Lewis and Clark went on together, because a few years later Lewis killed himself.
fort mandan
sacagawea
they went on an expedition with each other
No they did not. On their homeward trip back, Lewis and Clark went their separate ways. They later met up.
Right before the expedition Lewis went trough very hard training and excessive training to become fit for the job. Clark acted as Lewis's' secretary.