Red Trail, also sometimes called the Boardwalk Trail is the main trail running through the center of the Frank Knowles/Little River Reserve. It begins at Cornell Farm on Smith Neck Road and ends at the parking lot on Potomska Road. It is an easy two mile trail that spans two salt marshes via wooden boardwalks. A suspension bridge at the one mile mark rises up into to a small platform in the trees. The trail is fairly easy, though some people (and dogs) may find the suspension bridge a bit of a challenge.