In spite of what google maps says, this is a dead end. There's a jeep road of some sort at the end, which might be rideable with a mountain or cross bike, but certainly not a road bike. It's too bad, because the hill is spectacular otherwise.
Swaller Hill Road is located in Connecticut. It is 1645.8 meters long with an average gradient of 11.2% and a maximum gradient of 17.4%. Find similar hills.