<Tr> <Td> </Td> <Td> Maine </Td> <Td> 983 km (611 mi) </Td> <Td> </Td> <Td> Yukon </Td> <Td> 1,210 km (752 mi) </Td> </Tr> <Tr> <Td> </Td> <Td> Minnesota </Td> <Td> 880 km (547 mi) </Td> <Td> </Td> <Td> Quebec </Td> <Td> 813 km (505 mi) </Td> </Tr> <Tr> <Td> 5 </Td> <Td> Montana </Td> <Td> 877 km (545 mi) </Td> <Td> 5 </Td> <Td> Saskatchewan </Td> <Td> 632 km (393 mi) </Td> </Tr> <Tr> <Td> 6 </Td> <Td> New York </Td> <Td> 716 km (445 mi) </Td> <Td> 6 </Td> <Td> New Brunswick </Td> <Td> 513 km (318 mi) </Td> </Tr>

How many miles from boston to canadian border