Where is Nashua River Rail Trail? How long is the Nashua River Rail Trail?

Where is River Rail Trail?

Nashua River Rail Trail (from Ayer to Nashua) is a 19.6 Kilometer long, moderately visited section of track near Ayer, Massachusetts. It runs along a lake, along a river and there are often wildlife to see. Due to the slope and distance, the track is suitable for all performance levels. There are various activities. Dogs are allowed but must be kept on a leash.