Velo Quebec is the cycling organization there.
http://www.velo.qc.ca/english/index.php On this page is a link to Montreal's cycling map. Grog, a TE member can tell you more, she lived there for awhile.
http://www.routeverte.com/rv/index_e.php?page=carte Cycling route system=Route Verte (Green Route) It is marked system with signage. Some sections clearly market businesses and bed 'n breakfast places for cyclists.
http://www.routeverte.com/rv/index_e.php?code=outaouais lst year we bike toured in west of Ottawa (Ontario), in city itself and went as far east as Montebello.
2nd trip we went to Mont Tremblant. (a mountain bike area and ski hill area)with Route Verte route nearby.
http://www.routeverte.com/rv/index_e.php?code=quebec 3rd trip we cycled out of Quebec City, where we cycled the route northwest of Quebec City to Saint Raymond. There are some terrific goat cheese farms/outlets. More gourmet, stronger flavours as you would find from France. (Click on the white box, Accommodations Bienvenue Cyclistes, to locate accommodation. Red house icons will pop up.)
I haven't been to Perce Rock by the Gaspe Peninsula which is supposed to be lovely (and abit windy) and a bird sanctuary there.