Sand Lake is a 73.5-acre natural lake located in south Anchorage with a maximum depth of 39 feet. The lake features 2.2 miles of shoreline and has an elevation of 100 feet. Ground water upwelling occurs along the north and west shorelines from a shallow underlying aquifer.

The lake includes emergent vegetation in littoral areas, and dense forests line portions of the shoreline. While there is no natural surface outlet, the lake connects to Campbell Lake approximately one mile to the south via a storm drain system.

Primary access is available via a private concrete boat launch and a public dirt access point off 80th Avenue. The lake is situated within an urban setting, surrounded by residential neighborhoods, with Sand Lake Park providing public space on the eastern shore.

Wildlife viewing opportunities include bald eagles, loons, red-necked grebes, mallards, American widgeon, red-breasted mergansers, and various waterfowl. The lake historically supported nesting waterfowl populations.

The lake supports a sport fishery managed by the Alaska Department of Fish and Game, which stocks rainbow trout and Arctic char. Three-spine stickleback are the only naturally occurring fish species.

The lake's water quality is oligotrophic, meaning it has relatively low nutrient levels compared to other lakes in the area. Several private wells are located around the lake, drawing from deep aquifers that are separated from the lake by a clay confining layer.

Currently, the lake serves both recreational users and float plane operators who maintain aircraft on the water. The surrounding land ownership is primarily private, with the exception of Sand Lake Park, which is owned by the Municipality of Anchorage.