| Summit Lake | |
| Pushpin Map: | Ontario |
| Coords: | 45.0464°N -76.8425°W |
| Inflow: | Deadbeaver Creek |
| Outflow: | Unnamed creek to Palmerston Lake |
| Basin Countries: | Canada |
| Length: | 1.2km (00.7miles) |
| Width: | 0.5km (00.3miles) |
| Elevation: | 280m (920feet) |
Summit Lake is a lake in the Madawaska Highlands in North Frontenac, Frontenac County, Ontario, Canada, about 3.5km (02.2miles) northwest of the community of Ompah.
Summit Lake is about 1200m (3,900feet) long and 500m (1,600feet) wide, and lies at an elevation of 280m (920feet). The inflows are Deadbeaver Creek from the south, and an unnamed creek from the north. The primary outflow is an unnamed creek, towards Palmerston Lake, at the east end of the lake, which is controlled by a dam. The waters eventually flow via Conns Creek, the Mississippi River and the Ottawa River into the St. Lawrence River.