Cycling on the Trans-Canada Trail
Can I ride on the trail? Yes!
But be warned; the trail is a work-in-progress, some parts are fantastic and scenic while others are impassable by bike.
The goal of the trail is to reach completion by 2017, for Canada’s 150th birthday and the Trails 25th birthday. It is used not just by hikers and bikers, but also horseback riders, all-terrain vehicles and in the winter, cross-country skiers and snowmobilers. In theory, a shelter and drinking water should be available at regular intervals. But so far, this varies from region to region. Some provinces and jurisdictions have spent more money than others on the trail.
Because of these inconsistencies, while touring on a fully loaded bike don't rely on the trail for the entire country. However, do check out the Trails website and specifically its features section, which showcases parts of the trail and if it can be biked on. Also, it being a trail, chances of finding a nice wild-camping spot for the night are better than if you are riding along on a highway.
Website
The trail website has as nice interactive map, where you can zoom in on any location and look for the next covered shelter. Trail Map