These 9 Amazing Spots In South Dakota Are Perfect To Go Fishing. This bite tends to be quite reliable through the middle of August. In South Dakota, on Lake Oahe, May brings the start of our open water walleye fishing. This is a group I created for people to buy sell and trade items. Fishing Articles, Open Water Fishing Articles Every spring and summer, hundreds of thousands of people from all across the U.S. and the world journey to the Black Hills of South Dakota to take in the sights and monuments that our state is universally known for. Following the spawn, our walleyes become very predictable…meaning very hungry. You are allowed 4 walleye per day with an 8 fish possession limit. Open Water Fishing South Dakota has 13,041 members. One of the best ways to relax and enjoy the small things in life is to grab a fishing rod and head to the nearby pond or lake. Bring a cooler and a chair, or take the boat out on the water – either way, you can just sit back and see what happens. Lake Oahe Walleye Fishing Guide & Resort.