Lucy Stone Park in Warren serves as the final access point on the Upper Quaboag Blue Trail, marking the end of the smooth paddling section before the river becomes whitewater and is not recommended for casual paddlers at low flows.

The park offers parking and boat launch access for canoeists and kayakers exploring the scenic 12-mile trail through wildlife-rich marshlands and historic areas.

Note that the river below this point is more challenging and should only be attempted by skilled paddlers who have scouted conditions in advance.