| Rivière aux Outardes | |
| Source1 Location: | Clinton County, New York, New York State, United States |
| Mouth Location: | Ormstown, Le Haut-Saint-Laurent Regional County Municipality, Montérégie, Quebec, Canada |
| Progression: | Chateauguay River - Saint Lawrence River |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States, Canada |
| Subdivision Type2: | State - Province |
| Subdivision Name2: | New York State, Quebec |
| Subdivision Type3: | Region |
| Subdivision Name3: | Clinton County, New York (New York State), Montérégie (Quebec) |
| Subdivision Type4: | Region |
| Subdivision Name4: | Clinton County, New York, Le Haut-Saint-Laurent Regional County Municipality |
| Basin Size: | NaNkm2 |
| River System: | Saint Lawrence River |
| Tributaries Right: | (upstream) Finalyason Creek, rivière aux Outardes Est, School Creek, Flynn outlet. |
The Rivière aux Outardes (English: Bustard River) is a tributary of the Chateauguay River. It crosses the municipalities of Hinchinbrooke and Ormstown, in the Le Haut-Saint-Laurent Regional County Municipality, in the administrative region of Montérégie, in the province of Quebec, in Canada.
The surface of the rivière aux Outardes (except the rapids areas) is generally frozen from the beginning of December to the end of March; however, safe circulation on the ice is generally done from the end of December to the beginning of March. The water level of the river varies with the seasons and the precipitation; the spring flood occurs in March or April.
The main neighboring hydrographic slopes are:
The course of the "Rivière aux Outardes" begins at the confluence of several agricultural streams north of the hamlet Athelstan, east of the Trout River, southeast of the village of Huntingdon, north of the border between Canada and the United States, and south of the route 202.
The Rivière aux Outardes flows for to the mouth of the Rivière aux Outardes Est, in Hinchinbrooke; then 6.4 km to its mouth.
The Outardes River flows northeast in agricultural areas, more or less in parallel (south side) of Châteauguay River, and gradually approaching it. The confluence of these two rivers is located upstream from the route 138 bridge spanning the Châteauguay River and upstream from the village bridge of Ormstown spanning the Chateauguay River.
The "Chemin de la rivière aux Outardes" runs along the Rivière aux Outardes (on the south side), between Montée Rockburn and the mouth. The river segment between the "Rivière aux Outardes Est" and the mouth, has six rapids zones.
The toponym "Rivière aux Outardes" was formalized on December 5, 1968, at the Commission de toponymie du Québec.[1]