| Bear Brook | |
| Name Other: | French: ruisseau Bear |
| Pushpin Map: | Canada Southern Ontario |
| Pushpin Map Caption: | Location of the mouth of Bear Brook in Southern Ontario |
| Pushpin Map Alt: | Map of Southern Ontario with a dot at the location of the mouth of Bear Brook |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Ontario |
| Subdivision Type3: | County |
| Subdivision Name3: | Prescott and Russell |
| Subdivision Type4: | Municipalities |
| Source1: | Confluence of two unnamed streams |
| Source1 Location: | Edwards |
| Source1 Coordinates: | 45.3483°N -75.4636°W |
| Source1 Elevation: | 70m (230feet)[1] |
| Mouth: | South Nation River |
| Mouth Location: | The Nation |
| Mouth Coordinates: | 45.4197°N -75.0703°W |
| Mouth Elevation: | 48m (157feet) |
| River System: | Ottawa River drainage basin |
Bear Brook (fr|ruisseau Bear) is a small stream in the municipalities of Clarence-Rockland and The Nation, United Counties of Prescott and Russell, and the city of Ottawa in eastern Ontario, Canada. It forms in the fields and forests just north of Edwards, and flows in a mostly eastern direction to its mouth as a left tributary of the South Nation River.[2] [3] [4]
Communities along the brook include Edwards, Carlsbad Springs, Bearbrook, Cheney, and Bourget.
In the mid 19th century, the Bear Brook was used by loggers for floating timber to sawmills, a few of which operated in Carlsbad Springs from 1854 to 1905. It was also used by settlers for transportation to their homesteads. However the brook was too small and dry in the summer, and its use for transportation was quickly discontinued upon completion of Russell Road. All the surrounding mature forests have been logged, and consequently the brook drains faster.[5]