Old Eastern Marsh Trail Excellent walk with families or children. Birders will love it. By EL0427 in 4/18/2010 4:48:04 PM | This is a beautiful walk or ride through the Salisbury salt marshes. Open spaces with an abundance of wildlife and birds surround you on this 1.4 mile trail. Halfway through the hike there is a resting spot with amazing view of the wetlands. A birders paradise, plus not as congested as Plum Island.