trail (v.) Look up trail at Dictionary.com
c.1300, "to drag along behind," from O.Fr. trailler "to tow," ult. from V.L. *tragulare "to drag," from L. tragula "dragnet," probably related to trahere "to pull" (see tract (1)). The meaning "follow the trail of" is first recorded 1590.
trail (n.) Look up trail at Dictionary.com
c.1300, "train of a robe," from the source of trail (v.). The meaning "track or smell left by a person or animal" is also from 1590. Meaning "path or track worn in wilderness" is attested from 1807.