Big Sony is located ten miles southwest of Park Rapids in southern Hubbard County. Big Stony has a surface area of 343 acres and a maximum depth of 24 feet. A public access is located on the southwest shore of the lake. Big Stony provides fishing opportunities for walleye, northern pike, largemouth bass, and panfish.
The Minnesota Department of Natural Resources (DNR) has classified Minnesota's lakes into 43 different types based on physical, chemical, and other characteristics. Big Stony is in lake class 34. Class 34 lakes are generally characterized as small, shallow lakes with hard water.
Walleye abundance was within the range for similar type lakes and at the current management goal. Anglers will find good numbers of walleye in the 14-16 inch size range. Big Stony is currently stocked with walleye fingerlings during even numbered years. Northern pike abundance was within the range for similar type lakes, and comparable to historical surveys. Sampled northern pike had an average length and weight of 20 inches and 1.8 pounds, with pike measured up to 34 inches. Present and past surveys have shown Big Stony to support good populations of panfish and largemouth bass. Anglers will find good numbers of bluegill and pumpkinseed in the 6-8 inch size range and black crappie in the 9-10 inch size range. Past surveys have shown bluegill abundance to fluctuate from moderate to high numbers, while black crappie have cycled from low to moderate numbers. Anglers will find an excellent largemouth bass population, known for both numbers and sizes of bass. Good water quality, aquatic vegetative cover, and spawning substrate provide excellent habitat for largemouth bass in Big Stony.
Other species sampled in moderate numbers included white sucker, yellow bullhead, and rock bass. Black and brown bullhead were sampled in low numbers.
Currently no aquatic invasive species (AIS) have been identified in Big Stony. Boaters should take extra care and precaution to remove all aquatic vegetation from boats and trailers when leaving the lake.