| Summit Lake | |
| Pushpin Map: | Ontario |
| Coords: | 48.49°N -84.3683°W |
| Outflow: | Lochalsh River to Philip Lake |
| Basin Countries: | Canada |
| Length: | 0.63km (00.39miles) |
| Width: | 0.4km (00.2miles) |
| Elevation: | 377m (1,237feet) |
Summit Lake is a lake in the Unorganized North Part of Algoma District, Ontario, Canada. It is about 630m (2,070feet) long and 400m (1,300feet) wide, lies at an elevation of 377m (1,237feet). The lake is in the Michipicoten River system in the Lake Superior drainage basin, and is the source of the Lochalsh River. There are no primary inflows, and the primary outflow is the Lochalsh River, north towards St. Julien Lake, which flows into Dog Lake and then via the Michipicoten River into Lake Superior. The Algoma Central Railway runs along the east and shore, and the lake lies between Franz, on the line 4km (02miles) southwest, and Scully, 5km (03miles) north northeast.
A second Summit Lake in the Michipicoten River system, Summit Lake (Goudreau, Ontario), lies 28km (17miles) southwest.