Riverside Avenue Marshes is a wetland area located in Milton, Massachusetts. It covers about 40 acres of land and is home to a variety of plants and animals. The marshes are part of the Neponset River watershed and provide important ecological functions such as flood control, water quality improvement, and wildlife habitat. The marshes are also a popular destination for birdwatchers, hikers, and nature lovers who enjoy the scenic views and peaceful atmosphere. Riverside Avenue Marshes is one of the few remaining natural areas in the urbanized Boston metropolitan area and is a valuable resource for environmental education and conservation.

The marsh is at the end of Riverside Avenue adjacent to the Neponset River.