From Rhode Island points south take Rt 146 north to Rt 146A. Take a right on Great Steet and left on St Paul Street. This will bring you to Main Street in Blackstone, MA. Take a left onto Rt 122 (Main Street) and another left on County Street. County Street dead-ends at a parking area on the Blackstone River. Follow the trail to the left until you find the cliffs. The second cliff is the climbable one. If the water is high (Spring) you probably won't be able to get to the base of the cliff without swimming.
"Routes" is being generous. There is one climbable route here. The route goes up the center of the cliff and goes at 5.8ish. (See photo below.) If you are really bored and live nearby than this may be a fun way to spend a half-hour. The access is through Blackstone, MA but the cliff is actually just over the line in RI. It is somewhat loose shale like rock and about 30 feet in height. There is a bit of lichen on the rock. Don't bother going there if the Blackstone River is running high.
There are trees at the top of the cliff to set up top-ropes. Leading is not really practical due to the shortness of the route and rock quality.