Big Grassy River 35G is a Indian Reserve located in Rainy River, Ontario.

• Latitude: 49° 3' 33'' North   (decimal: 49.0591666)
• Longitude: 94° 18' 33'' West   (decimal: -94.3091666)
• Topography Feature Category: Indian Reserve
• Geographical Feature: Indian Reserve - Réserve indienne
• Canadian Province/Territory: Ontario
• Location: Rainy River
• Atlas of Canada Locator Map: Big Grassy River 35G
• GPS Coordinate Locator Map: Big Grassy River 35G Lat/Long