Question: where does the blackstone river start and end

title: Blackstone River
text: The river is formed in Worcester , Massachusetts by the confluence of the Middle River and Mill Brook . From there , it follows a rough southeast course through Millbury , Sutton , Grafton , Northbridge , Uxbridge , Millville , and Blackstone . It then continues into Rhode Island , where it flows through Woonsocket , Cumberland , Lincoln , Central Falls , and Pawtucket , where the river then reaches Pawtucket Falls . After that , the river becomes tidal , and flows into the Seekonk River just north of Providence . Other tributaries join the Blackstone along the way , such as the West and Mumford River , at Uxbridge , and The Branch River in North Smithfield . 

Answer: answer: Blackstone River is formed in Worcester , Massachusetts, and it flows into the Seekonk River just north of Providence .