Allequash Lake is located within the Northern Highland-American Legion State Forest, Vilas County. T41N-R7E, Sections 16, 17, 20, 21. 398 acres. (detailed lake description by the WDNR)
It is a drainage lake with predominantly sand and gravel substrate. It has a surface area of 168.4 hectare, 9.5 kilometers of mostly undeveloped shoreline and a maximum depth of 8 meters.