This seems to indicate that Maritimes are found in New York State:
SUNY-ESF E-Center: Snakes of New York
And this one
http://www.fs.fed.us/ne/newtown_squa...ne_gtr108d.pdf
says...
RANGE:
Eastern Quebec extending to Alberta in discontinuous
populations, s. to n. New Hampshire, New York
and n. Michigan. Intergrades with T. s, sirtalis to w. and
s. parts of range.