Request a map, or send a correction
Know of a historic trail map for your state, or found something wrong on an overlay? Tell us here. Every contiguous state now has at least a regional overlay; dedicated state maps are added by request and by which archives hold public-domain sheets.
On the roadmap
Alaska and Hawaiʻi are next for first coverage. Dedicated state trail maps with public-domain sources already identified: Wisconsin (Brown 1930), Ohio (Mills 1914), Connecticut (Griswold–Spiess 1930), Indiana (Wilson 1919), California (Kroeber 1925), Colorado (USGS trail maps), and Michigan (Hinsdale 1931, public domain on Jan 1, 2027).