Route 125 is a Quebec highway running from Montreal (on Pie-IX Boulevard near the Olympic Stadium) to Saint-Donat, Lanaudière, Quebec in the Lanaudière. The southern section of Route 125 runs parallel to Autoroute 25 in Laval, Mascouche, and Terrebonne. At Saint-Esprit, the Autoroute ends, and 125 continues northwards until the entrance to the Mont Tremblant Provincial Park north of Saint-Donat.

• Montreal (Rosemont–La Petite-Patrie / Villeray–Saint-Michel–Parc-Extension / Montréal-Nord)
• Laval
• Terrebonne
• Mascouche
• Saint-Roch-de-l'Achigan
• Saint-Roch-Ouest
• Saint-Esprit
• Sainte-Julienne
• Rawdon
• Chertsey
• Entrelacs
• Notre-Dame-de-la-Merci
• Saint-Donat

RCM	Location	km	mi	Exit	Destinations	Notes
Montréal	Montréal	0.0	0.0		Rue Sherbrooke (R-138) / Boulevard Pie-IX	A-125 southern terminus; Boulevard Pie-IX continues south
		3.9	2.4		A-40 (TCH) – Québec, Ottawa, Gatineau	A-40 exit 76
Rivière des Prairies		8.7– 9.1	5.4– 5.7	Pont Pie-IX (Pie IX Bridge)
Laval		9.5	5.9	–	Boulevard de la Concorde / Boulevard Lévesque	Interchange
		10.4	6.5	–	Boulevard Saint-Martin	Interchange; former R-148 west
		11.1	6.9	–	Boulevard Lite	Interchange; southbound exit and northbound entrance; northbound exit via Avenue Laplace
		11.5	7.1	30	A-440 west / Boulevard Pie-IX north	A-440 exit 30; south end of A-440 concurrency; exit numbers follow A-440
		12.5	7.8	31	Montée Saint-François
		14.9– 16.0	9.3– 9.9	34 35	A-25 / A-440 ends – Terrebonne, Montréal	A-440 northern terminus and concurrency; A-25 exit 17; no access from A-25 north to R-125 north; signed as exits 34 (A-440 to R-125) and 35 (A-440 to A-25)
Rivière des Mille Îles		20.4– 20.9	12.7– 13.0	Pont Sophie-Masson (Sophie Masson Bridge)
Les Moulins	Terrebonne	21.2	13.2		R-344 east (Rue Saint-Louis)	South end of R-344 concurrency; R-125 follows Rue Saint-Louis
		21.4	13.3		R-344 west (Rue Saint-Louis)	North end of R-344 concurrency; R-125 follows Montée Masson
		23.7	14.7		A-25 to A-640 / Grande Allée – Montréal, Rawdon	A-25 exit 24
Montcalm	Saint-Roch-Ouest	43.1	26.8	44	R-339 / Ancienne Route 125 – Saint-Roch-de-l'Achigan, Saint-Lin-Laurentides A-25 south – Montréal	South end of A-25 concurrency; exit numbers follow A-25; R-125 becomes unsigned
	Saint-Esprit	46.3	28.8	46	R-158 west – Saint-Lin-Laurentides, Saint-Jérôme	South end of R-158 concurrency; A-25 becomes unsigned; R-125 signage resumes
		49.9	31.0		A-25 ends / R-158 east – Saint-Jacques, Joliette	A-25 northern terminus; north end of A-25 / R-158 concurrency
	Sainte-Julienne	58.3	36.2		R-337 south / R-346 east – Saint-Calixte, Saint-Liguori	South end of R-337 concurrency; R-346 western terminus
		63.1	39.2		R-337 north – Rawdon	North end of R-337 concurrency
Matawinie	Rawdon	67.3	41.8		R-348 east – Rawdon
		74.1	46.0		R-341 south – Rawdon
	Rawdon – Chertsey boundary	77.4	48.1		R-335 south – Saint-Calixte
	Notre-Dame-de-la-Merci	105.2	65.4		R-347 south – Saint-Côme
	Saint-Donat	120.1	74.6		R-329 south – Lantier, Sainte-Agathe-des-Monts
		132.6	82.4		Parc national du Mont-Tremblant	R-125 northern terminus; continues into Mont-Tremblant National Park
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       Incomplete access

• List of Quebec provincial highways
• Pie IX Bridge
• Sophie Masson Bridge

• Provincial Route Map (Courtesy of the Quebec Ministry of Transportation) (in French)

45°48′25″N 73°36′54″W / 45.8069°N 73.615°W / 45.8069; -73.615