| Summit Lake | |
| Pushpin Map: | Ontario |
| Coords: | 47.2736°N -79.7622°W |
| Outflow: | Unnamed creek to Johnson Lake |
| Basin Countries: | Canada |
| Length: | 0.43km (00.27miles) |
| Width: | 0.08km (00.05miles) |
| Elevation: | 324m (1,063feet) |
Summit Lake is a lake in Timiskaming District, Ontario, Canada, about 7km (04miles) southeast of the community of Latchford, and 250m (820feet) north of the Johnson stop and settlement on the Ontario Northland Railway mainline, which runs along the entire east side of the lake. Highway 11 (Frontier Route) runs just west of the lake.
Summit Lake is about 430m (1,410feet) long and 80m (260feet) wide, and lies at an elevation of 324m (1,063feet). There are no inflows. The primary outflow is an unnamed creek, towards Johnson Lake, at the south end of the lake, which eventually flows via Rib Lake, Net Creek, Net Lake, Cassels Lake, Rabbit Lake, the Matabitchuan River, Lake Timiskaming, and the Ottawa River into the St. Lawrence River.