Towpath through the Marsh ID: 3305 | This file appears in: Beaver Marsh Visitors to the national park can still use the towpath trail to travel through the Beaver Marsh. The National Park Service created a boardwalk over the marshland to prevent the trail from damaging the land and wildlife. | Creator: Sara Guren | Source: National Park Service Download Original File CreatorSara GurenSourceNational Park Service "Towpath through the Marsh" appears in: Beaver Marsh