| Route 243 | ||||
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| Route information | ||||
| Maintained by Transports Québec | ||||
| Length: | 122.5 km (76.1 mi) | |||
| Major junctions | ||||
| South end: |
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| North end: |
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| Highway system | ||||
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Route 243 is a north/south highway on the south shore of the Saint Lawrence River. Its northern terminus is in Saint-Félix-de-Kingsey at the junction of Route 255 and its southern terminus is in the township of Potton where it crosses the Canada–US border at the North Troy-Highwater Border Crossing into Vermont and becomes Vermont Route 243. Route 243 is not a busy highway as it does not go through big towns.
The highway has three concurrencies: