Great little trail, although it can be a bit tricky to find as others mentioned. In fact, the GPS almost sent our family driving straight into the woods as it insisted Plain Rd was a through road to take us from West Greenwich to the start of the trail in Exeter. (The road very well may have continued as an old fire road at some point, but it looked like an overgrown, old fire road that had been badly eroded over time that more resembled a gully than any type of road.) It was pretty scary that a GPS would try to send you that way, unless perhaps you had a dirt bike. Anyway, watch out for that.
We used online posts, photos and Google earth to guess at where to go. Ultimately, we learned there were at least two options to park for this trail.
First option is where we started off: Plain Rd (in Exeter) about a mile in off of Escoheag Hill Rd - where Wood River crosses paths with Plain Rd. There is a unique looking, old red house or building when you turn off from Escoheag Hill Rd that will let you know you are in the right place. There is a bridge here, and we found the signs for one entrance to the Ben Utter Trail on the west side of the bridge. There is room on either side of the bridge for perhaps a handful of cars to park on each side, and with very little traffic, I imagine you would be fine parking on the side of the road if for some reason there were a ton of cars...but I doubt you will find that necessary. Note that this is a dirt road, yet it was a well maintained dirt road that you could drive down in a car...in contrast to the second entrance which really requires an SUV, truck, or capable jeep.
From there, the app I used tracked our hike north to Stepping stone falls to be about 1.25 or 1.3 miles. The trail runs along or near the river for most of the trail. There are rocks and roots scattered throughout the trail, so watch your step. There are some cool scenes and features, little bridges, smaller falls, and rock stairs along the way. The best surprise was "Smiling Rock" (see photos) a cool huge boulder with a natural crack resembling a smile. Since the rock's shape resembles a face, some people placed two rocks on top for eyes and there you have it "Smiling Rock".
Second entrance: About a mile or so further north off Escoheag Hill Rd is another dirt road, Falls River Rd (in West Greenwich). This road is much rougher and more challenging for your vehicle, so you'll really need a capable vehicle. The payoff is you can park right next to the falls. So if you want to make the falls the primary focus of your trip, and hiking just an option, this would be a great place to start. Some people just hung out there, enjoyed the scenes of the falls, enjoyed some swimming and a little rope swing. With kids, we may go straight to this location the next time we go. In fact, by the time we hiked from Plain Rd entrance to the falls off Falls River Rd, our two young kids had their fill of hiking for the day, so I hiked back with the baby on my back, got the SUV and drove to Falls River Rd to pickup my wife and 5 year old.
Either way you do it, it was a nice trail. I hope the details about the two entrances we found help you find it easier. Have fun if you visit, be sure to check out the "Smiling Rock" and don't let the GPS make you drive into the trees! read more