General
Walking tours throughout Howard County
Historic Ellicott City
http://www.visithowardcounty.com/sight-seeing/walking-tours
Historic Laurel
https://www.cityoflaurel.org/comm/visitor-information/about-laurel-and-its-history/walking-tour-historic-laurel
Hiking in Maryland
http://www.everytrail.com/best/hiking-maryland
Maryland Trail Maps
https://dnr.maryland.gov/Pages/DNR_TrailMaps.aspx
Columbia Volksmarch Club
http://www.mdvolks.org/CVC/
Additional Ideas