Quebec Route 321

Route 321 is a regional road in Quebec, Canada, that consists of two unconnected sections: one in Papineau Regional County Municipality that runs from Papineauville to Duhamel, and a second section of the road goes from Nominingue to L'Ascension in the Antoine-Labelle Regional County Municipality; there's 67 to 72 km in between (depending on the route).

Route 321
Route information
Maintained by Transports Québec
Length	85.7 km[1] (53.3 mi)
Papineau section
Length	52.6 km[1] (32.7 mi)
South end	R-148 in Papineauville
Major intersections	A-50 in Papineauville R-317 in Ripon R-315 in Chénéville
North end	Rue Principal in Duhamel
Antoine-Labelle section
Length	33.1 km[1] (20.6 mi)
South end	Chemin Chapleau in Nominingue
Major intersections	R-117 (TCH) in Rivière-Rouge
North end	Chemin des Îles in L'Ascension
Location
Country	Canada
Province	Quebec
Highway system
Quebec provincial highways Autoroutes List Former
← R-317 → R-323

The portion north of Chénéville in Papineau RCM is still unmarked on some maps, but it is signed on the road, and is very sinuous. On most of the Chénéville-Duhamel part, it is impossible to reach the 90 km/h speed. In fact it is most of the time a 50–70 km/h speed limit road. It is frequented by campers who go to the Lac Simon recreational center during the summer.