Spring has sprung, the cycling networks in Québec, the Route Verte and other regional or municipal paths, are now mostly open.
So it's again possible to explore or use the network to go camping, as part of touring, or just to get from point A to B.
And you should know that if you are touring or arriving on a bike, there is a program called "Bienvenue Cyclistes" where all national parks (provincial parks here) will offer you a campground for less than $10. Keep in mind you also have to pay entry fees that are around $10 too. About the same for some wood. This is also possible in some other establishments. Consult the map linked above.
You should also know that you can use public transit around Montréal to bring your bike with you. It's included in the ticket. So you can take the metro, but more importantly, the REM, and the commuter trains. There are also some exo buses with bike racks. So you can go to St-Jérôme for Le P'tit Train du Nord in a commuter train with your bike for a few dollars. From that trail you can also reach another park, Parc national du Mont Tremblant
Today I'm going to see my family from Montréal to the Drummondville region. In the other direction. The ~140 km to get there is entirely bike trails/paths. I cut the itinerary in two stages and stop in a small national park called the Parc national de la Yamaska for a night of camping.
The first part to get there is using a network of local bike trails. The first from Longueuil to Chambly is called La montée du Chemin de Chambly. Then from the other side of the Richelieu river there is a trail called La route des Champs to Granby. And from Granby to the park it's local trails. They have very nice cycling infra in that region.
Here are some pictures of La route des Champs and the local trail before the park.

Then tomorrow, I will use another trail connecting to the park called La Campagnarde. This one goes to Drummondville, entirely on small gravel, and sometimes very remote and quiet.
I do this multiple times a year so I thought I would share some tricks and adventures. And I've been encouraged to by /u/Evkob.
Have fun cycling everyone!
The practice must vary depending on the region and the tolerance level of the local police and parking enforcement. Around Montreal, when there's no parking near a work site, some construction workers just abandon their pickup trucks anywhere there's any amount of space, often in crosswalks because that's where there's "space" left, and jam a high-vis vest in their window to show "who they are", hoping they won't get a ticket. And apparently it works or they wouldn't be doing it that much.
I find it dangerous for pedestrians as they are now emerging from both sides of a pickup truck higher than they are, making it difficult to see them from the vehicles passing that crosswalk, but it's unfortunately a frequent thing here.