Marquart Lake is a small, clear lake located just east of Merritt, British Columbia, reached by turning north off Highway 97C (Okanagan Connector) at the Marquart/Lundbom Lakes recreation sites sign.

The lake sits within a recreation area that offers both vehicle-accessible and walk-in campsites, a gravel boat launch, and a fishing dock installed in 2021.

The 23-hectare lake is best known for rainbow trout fishing, with trolling in deeper water being the most productive technique. Float fishing and lure casting from shore are also viable options, particularly along the day-use area at the southwestern end.

The lake is rumored to hold rainbow and brook trout weighing up to 3 kg. A short loop trail circles the lake, and a hiking trail leads to walk-in campsites on a hill overlooking the water.