uhhh....the Oregon Trail started at many different points along the Missouri River. Westport (since swallowed by Kansas City) was the most popular for a while. The "jump off" points moved upriver until well into the late 1800's. A great book, if you can wade thru it, is "The Great Platte River Road". It was quite enlightening. Starting points varied from above Omaha all the way down to Westport. The Santa Fe trail originally began at New Franklin, Missouri, moved to the Sedalia area and ended up also around Westport. It too had many different staging areas.
Mama says supper is ready!!!
Vic