| Gumboot Lake | |
| Location: | Thunder Bay District, Ontario |
| Coords: | 48.9353°N -87.3722°W |
| Pushpin Map: | Ontario |
| Inflow: | Whitesand River |
| Outflow: | Whitesand River |
| Basin Countries: | Canada |
| Length: | 0.75km (00.47miles) |
| Width: | 0.29km (00.18miles) |
| Elevation: | 345m (1,132feet) |
Gumboot Lake is a lake in Thunder Bay District, Ontario, Canada. It is about 750m (2,460feet) long and 290m (950feet) wide, and lies at an elevation of 345m (1,132feet) about 15km (09miles) northwest of the community of Schreiber. The primary inflow and outflow is the Whitesand River, which flows downstream to Longcanoe Lake.