Learn more about America’s migration trails online:
Beverly Whitaker, Early American Roads and Trails (http://freepages.genealogy.rootsweb.ancestry.com/~gentutor/trails.html : 2014).
“Zane’s Trace,” Touring Ohio, the Heart of America (http://www.touring-ohio.com/history/zane-trace.html : 2014).
Cyndi Howells, “Migration Routes, Roads & Trails,” Cyndi’s List (http://www.cyndislist.com/migration : 2014).
Many historic maps identify trails and wagon roads:
Cartography Associates, David Rumsey Map Collection (http://www.davidrumsey.com : 2014).
University of Alabama,”Historical Maps of Ohio,” Alabama Maps (http://alabamamaps.ua.edu/historicalmaps/us_states/ohio/index2_1891-1895.htm : 2014).
Library of Congress, “Maps,” American Memory (http://memory.loc.gov/ammem/browse/ListSome.php?category=Maps : 2014).
Carleton’s 1850 Sectional Map of Iowa
One of my favorite Iowa maps, found digitally at American Memory, is Guy H. Carleton’s 1850 Sectional map of the state of Iowa, compiled from the United States surveys also exhibiting the internal improvements, distances between towns & villages, lines of projected rail roads &c. &c. (Dubuque: Guy H. Carleton, 1850).
Detail Davis County, Carleton’s 1850 Sectional Map of Iowa
It’s a great map, showing the layout of Iowa’s counties, section lines, waterways, communities, and major trails as they existed in 1850. You can zero in to see specific counties in greater detail. Many of the communities have long since disappeared; this is a wonderful resource for picturing the “lay of the land” as your ancestor might have experienced it.