Sporley Lake is a 76.4-acre inland lake located in Marquette County, Michigan, in sections 5, 31, and 32 of Townships 45 and 46 North, Range 24 West. Situated approximately three miles northeast of Gwinn in the north-central Upper Peninsula, this moderately deep lake reaches a maximum depth of 42 feet with a shoreline development of 1.5, providing 50% more shoreline than a circular lake of comparable size. The lake sits near the headwaters of the Chocolay River system and features a basin of glacial origin surrounded by gently rolling terrain with sandy soils. The area is densely wooded with pine, spruce, and mixed hardwoods, creating a scenic and relatively undeveloped fishing destination with only six cottages along its extensive shoreline.