Millers River, Otter River, and Lake Denison is a 10.5 mile trail located near Winchendon, MA. The trail is primarily used for hiking and canoeing and is accessible from April until October. 10.5 miles canoeing hiking Expand Map Sign up now to see this map! Reviews (0)Photos (6)Recordings (3)No one has reviewed this trail yet. Be the first!