This park has a pleasant trail on the old towpath. The trail has views of both the canal and the Blackstone River. You can walk a couple miles south of the Visitor Center, or a couple miles north of the Visitor Center; the southern route is smoother, easier to walk. The full name of the park is “Blackstone River and Canal Heritage State Park.”
If you walk north from the Visitor Center, you can take the “straight trail,” along the river/canal, or you can turn west from the river/canal, and climb Goat Hill. Goat Hill has lots of erratic boulders, and a few NativeAmerican stone-structures. It doesn’t have a view from the summit, however.
Below is a 3-mile route that starts at the Visitor Center, then climbs Goat Hill. This trail isn’t as pleasant as the trails along the river/canal, but it might appeal to people interested in NativeAmerican stone-structures.
If you want a good view, you should drive to the Lookout Rock Trail, which is east of the river/canal, on Quaker Street (map below).
It’s a short walk to Lookout Rock (quarter-mile). When I was there (October 2024), the river was low, and barely visible from Lookout Rock. AllTrails shows the trail to Lookout Rock, then another, similar spot further north. This “northern lookout” is a dud, a bug in AllTrails — ignore it.