Fishing Johnson Lake

Johnson Lake offers excellent Largemouth Bass fishing with fish growing well above the state average and reaching the 14-inch size limit by age 3-4. The bass population shows good recruitment with 68% of the catch exceeding the minimum size. Bluegill fishing has improved dramatically since the 2016 transfer of 810 fish from Iron County's Indian Lake - the population is now naturally reproducing with 8 age classes present, though growth is below average at -0.9 inches. Northern Pike are abundant but slow-growing, averaging 21.4 inches with only 23% reaching the 24-inch minimum - expect plenty of sorting for keepers. The thermocline sits at 24 feet in summer with good dissolved oxygen down to 34 feet, keeping fish active in deeper water during hot weather. This 78-acre lake stratifies strongly with cool water and adequate oxygen available throughout much of the water column during stressful periods. Habitat is the limiting factor here - the heavily developed shoreline (44 dwellings per mile vs. 14 average regionally) has resulted in low woody debris density at just 87 logs per mile compared to the regional average of 201. Private brush bundle installations between 2014-2019 at 10-20 foot depths have helped, and underwater cameras confirm multiple year classes of Bluegill using these structures. The forage base is dominated by Bluntnose Minnows (1,845 captured) with a large population of Common White Suckers providing biomass. Yellow Perch are abundant but small, growing below average and rarely exceeding 7 inches. The lake's unique depth and water clarity once supported successful trout management from the 1940s-1990s before illegal introductions of Northern Pike and Walleye made warmwater management more practical.