It's an inland lake, roughly 650 acres. The obstacles underwater is closer to shore and some known danger areas by everyone on the lake. The problem with that lake is that you can walk 20-30 yards out in some places and the water is only about 3 feet deep, while other places its 10+ feet, also the water level varies throughout the day so it's a bit difficult to know where the ground is and how low the outboard should be at that point. It's more likely to hit the ground with your prop rather then a rock or log.