A couple of Canadian blogs I like to follow are Confessions of a Train Geek and Trackside Treasure.
Confessions of a Train Geek, by Steve Boyko, contains photos and posts about railways and railfanning in Canada (and, occasionally, in the U.S.) He also has pages about BNSF in Manitoba, the Central Manitoba Railway, CN in New Brunswick, Industrial Railways, the New Brunswick Southern Railway, the New Brunswick East Coast Railway, the Prairie Dog Central and VIA Rail.
You can find it at http://blog.traingeek.ca/
Another one is Trackside Treasure, by Eric. "Trips, trains and thirty years trackside with Canada's railways," he says at the top of the page. "100% Canadian Prototype Railroading. If you're looking for variety in Canadian freight and passenger railroading, with a retrospective flavour, you won't be disappointed."
You can find it at http://tracksidetreasure.blogspot.com/