new york state route 2 (ny 2) is a state highway in the capital district of new york in the united states. it extends for from an interchange with interstate 87 (i-87) and ny 7 in the town of colonie to the massachusetts state line in petersburgh, where it continues to boston as massachusetts route 2. the route passes through the cities of watervliet and troy, where it connects to ny 32 and u.s. route 4, respectively. in grafton, located midway between troy and massachusetts, ny 2 serves grafton lakes state park.