Originally Posted by
xyzzy834
The Adventure Cycling Association has a
mapped route following the historic underground railroad that ruan through Ohio from roughly Cincinnati to Lake Erie. I've never biked this particular route, but I've found the ACA maps and routes to be generally very good on other routes I've followed.
You could look for a route NNW from Ripley and hook up around Xenia or head more NW to Milford and get on from there. At the other end, Oberlin is pretty close to Huron. I'd ride N to Vermillion to stop at the
Main St. Soda Grill (photo below) for a root beer float before heading back west along Rt. 6 to Huron. I've ridden Rt. 6 along Lake Erie before and it's a good route.
The ACA route appears to follow the Little Miami Trail to Xenia, then more trails to London.
This map starts at Cincinnati and connects to the south end of the trail. I haven't done the NW part past Xenia, but I think it's flat farmland out there. The trail up to Xenia is very nice.
Cincinnati to London on the trails map
If you want to avoid flat lands, east of Hillsboro is very rural, and starts getting hilly. See the "Terrain" map option on google maps.