Lake Spāre is a clear-water eutrophic lake located in Ģibuļu Parish, Talsi Municipality, northwest of the village of Spāre. The lake covers a surface area of 201.1 hectares, with an average depth of 2.4 meters and a maximum depth reaching 5.6 meters. It features low shores, a sandy and muddy bed, and is surrounded by mixed and coniferous forests. A single island measuring 0.3 hectares is situated in the western part of the lake.
The lake is fed by the Vidusupe River and several drainage ditches, while the Kāņupe River flows out from its southeastern section toward Lake Usma. Lake Spāre serves as an important local ecosystem and recreational site; it is inhabited by perch, pike, roach, tench, bream, and zander, and accommodates licensed angling along with designated resting and swimming areas.