| Route information | ||||
|---|---|---|---|---|
| Maintained by Transports Québec | ||||
| Length | 28.5 km (17.7 mi) | |||
| Major junctions | ||||
| South end | ||||
| North end | ||||
| Location | ||||
| Country | Canada | |||
| Province | Quebec | |||
| Major cities | Saint-Chrysostome, Sainte-Martine | |||
| Highway system | ||||
| ||||
Route 203 is a provincial highway located in the Montérégie region of Quebec south of Montreal. The highway starts from the Canada–United States border south of Havelock at the north end of County Road 10 at Cannon Corners at the Cannon Corners-Covey Hill Border Crossing in Mooers, NY. From there, it proceeds north toward Saint-Chrysostome, from there it follows the north shore of English River until it connects with Route 138 in Sainte-Martine just northeast of Très-Saint-Sacrement.
The entire route is in Le Haut-Saint-Laurent RCM.
| Location | km | mi | Destinations | Notes | |
|---|---|---|---|---|---|
| Havelock | 0 | 0.0 | Cannon Corners–Covey Hill Border Crossing; New York state line | ||
| 4.9 | 3.0 | ||||
| Saint-Chrysostome | 11.4 | 7.1 | |||
| Sainte-Martine | 28.5 | 17.7 | Northern terminus | ||
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi | |||||