I'm having such a good time on dirt roads with the Trail 125 that I wanted to find more of them. I found the site https://gravelmap.com, which let's you see dirt and gravel roads on a map. it's pretty accurate around my area. HOWEVER, be aware that there doesn't seem to be a filter for non-motorized access only. Example, around Philly area you have the Perkiomen Trail that is not for motorized access but shows up on this map.