The Old Yankton Trail and Stage Road

Here is preserved a section of
THE OLD YANKTON TRAIL
AND
STAGE ROAD
Over this trail the people
of Sioux Falls fled to Yankton
under cavalry escort for
safety from hostile
Sioux indians, Aug. 28, 1862.
This tablet placed by Sophomore
Class of 1926 Sioux Falls College.
Auspices
Minnehaha County Historical Society

This is the oldest marker I've yet seen, placed in 1926. The second photo doesn't really give a good sense of what is there; the remnants of the ruts left behind by wagon wheels and horse traffic. The site is located on the campus of The University of Sioux Falls (formerly Sioux Falls College.) I'm not aware of any other undisturbed sections of the old trail, but there is a street named Old Yankton Trail Road that presumably follows the original. I would imagine that there are other sections of the original in more remote regions that have survived.