There are lots of paths that are tagged surface=trail within a 30mile radius of this point. See https://overpass-turbo.eu/s/1jJO.

"trail" is not listed at https://wiki.openstreetmap.org/wiki/Key:surface#Values, so it's probably useless for routing apps.

What's the meaning of this value? surface=ground?!

I think it might make sense to replace this tag with a more useful value via an automated edit.