Lake index snapshot: Jul 15, 2026. Individual survey dates are not supplied in this index.
Big Grassy River fishing information
Big Grassy River is a stream or river in Ontario’s Fisheries Management Zone 5. Use this profile for recorded fish species, available lake measurements and fishing-zone information. Open the interactive map for live conditions and additional records.
Official zone rules ↗
Big Grassy River depth information
The bundled Ontario lake-profile record does not provide a maximum-depth value for Big Grassy River. Depth contours may still appear on the interactive map where Ontario has surveyed bathymetry, but those contours are reference information and are not a navigational chart.
Fish species in Big Grassy River
Species come from MNRF survey records — absence of a record doesn't guarantee absence of the fish.
Fishing access
Access-point details have not been included in this lake’s saved profile. This does not establish whether public access is available.
Look for access points on the map →
Stocking history
Stocking details have not been included in this lake’s saved profile. This does not mean it has never been stocked.
Check stocking history on the map →
Nearby lakes and rivers
Browse all named waterbodies in FMZ 5 →
Open Big Grassy River on the interactive map → for live weather, water levels, solunar times and full stocking history. Always confirm seasons, limits and sanctuaries in the official Ontario Fishing Regulations Summary.