Did the Marsh Trail starting from the Sandy Neck Beach Gate House. Total of 6.6 miles, we only did 2. In high tide/after rain, trail is covered in water and is very muddy. Had to go off the trail to traverse. Marsh views are wonderful, spotted a turtle! My 55 year old mothet had trouble crossing the sand dunes in the sun, that was a lot. Return walk is straight along the beach, scenic, but a straight shot, kind of boring.