The trail is totally ridable. Check for ticks.
Anyone can view the heatmap and its a super useful tool for route planning. Strava
Heatmap
Barn Island is a state management area with trails. The main one is gravel doubletrack across the salt marshes. Views of little Naragansett bay, sandy point island and Napatree point. Best part is, it gets you off a bad strech of Rt1 if you continue around Greenhaven rd to Mechanic st.