Some excellent single track in Ottawa at South March Highlands (Kanata Lakes), plus smaller areas here and there - Lots of hilly stuff in Gatineau, dirt road stuff there too if that's what you're looking for.
There's some Ottawa Cyclo-Cross blogs http://http://ottawa.cx/and websites http://www.cyclocross.org/ to look at and Ottawa Mountain Bike Assoc http://www.ottawamba.org/with lots of info....
There's some Ottawa Cyclo-Cross blogs http://http://ottawa.cx/and websites http://www.cyclocross.org/ to look at and Ottawa Mountain Bike Assoc http://www.ottawamba.org/with lots of info....