| Horsefly River | |
| River | |
| Country | Canada |
|---|---|
| Province | British Columbia |
| Source | Near Wells Gray Provincial Park |
| - coordinates | [1] |
| Mouth | Quesnel River |
| - coordinates | [1] |
| Length | 98 km (61 mi) [2] |
The Horsefly River is a river in the Cariboo district of British Columbia, Canada. Originating near the Wells Gray Provincial Park, it is a tributary to the Quesnel River, which in turn is a major tributary of the Fraser River. The Horsefly River is a spawning ground for sockeye, chinook and coho salmon.