I"ve been emailing the gummint up in Manitoba, and according to the Premier's office, Toews Lake is situated about 95 kilometres north of Flin Flon, Manitoba. It is approximately 2.4 km long and 1.6 km wide. The latitude is 55° 33’ 56" and the longitude is 101° 46’ 22". The lightly shaded lake in the center of this map seems to be it.