Montreal connection to Massena NY ? (Seaway Trail)

[damselfli]

I am looking for a route from Montreal to Massena NY where we can connect with the New York State Seaway Trail along the St Lawrence and Lake Ontario as far south as Oswego. From there we would need to hop to Syracuse for flight home.
The American Byways website has info for New York's Seaway Trail but that route ends at Massena.  http://www.byways.org/browse/byways/2200/travel.html  

Any suggestions on the connection from Montreal?
We've tried to find info on traveling southwest on the north side of the St Lawrence to Cornwall, and crossing the border; not having much luck with bike maps for that section.

Has anyone bike the Seaway Trail along this portion?

Suggestions on the Oswego/Syracuse leg?

Are there any good sources for maps that will show more info on gradient of these roads?

The Route Verte is available in French language version - it is "Sold Out" in the English version.

[raytylicki32]

  I Know that CSX-CN has a freight train at Massena..
would you like info on that?

[damselfli]

CSX-CN Freight Train... you mean as a way to get across the border to Canada (rather than riding the bike)?

I guess it wouldn't hurt to know about it.