I map many trails on osm from personal site surveys and a combination of sat imagery and my gpx files. No way google is doing that because there is no one to steal the data from. It was me, the enthusiast that put it in osm directly. That’s just me and the trails I load tho. Example - Latest was short one at monkeyface falls. https://www.openstreetmap.org/#map=19/34.098058/-116.955639