Beautifully marked brown trout, like this one, can be found almost anywhere in the water column at this time of the year. Photo by Tom Berg

For Lake Michigan salmon and trout fishermen, May is a transitional month. Earlier in the spring, coho salmon and brown trout are caught in large numbers by anglers fishing close to shore in very shallow water. During the summer, coho and chinook salmon, as well as lake trout and steelhead, are caught by trollers out in deep water. This deep water can be miles and miles from shore.

During May, gradually warming water temperatures cause the coldwater trout and salmon to begin moving offshore and to cruise deeper in the water column. At the beginning of the month, there may be schools of coho salmon hanging around only a mile or two from shore. By the end of May, however, the same schools may be found several miles offshore.

One of the nice things about fishing Lake Michigan during May is the variety of fish that can be caught on a daily basis. Cohos are not the only fish that make their way into the cooler. Steelhead trout also begin appearing in larger numbers, and chinook salmon become more common, too. Even lake trout and brown trout are caught with some regularity.

Once you find a concentration of fish, the action can be dynamite. Quick limits are often the rule, and since the catch is typically made up of multiple species, there could be a wide range of fish sizes in the cooler. There are usually no complaints by the anglers onboard when a 15-pound steelhead crashes the party!

To be consistently successful while trolling at this time of the year, however, you must be willing to search for the fish. Since the salmon and trout are on the move, they can be hard to find. The best anglers always have a plan for finding the fish. If you hit the water without a plan, you may go home with an empty cooler.

FINDING SILVER FISH
Your "fish-finding" plan may be as simple as using other boats as an indicator of schooling fish. There are definitely times when a hot school of salmon can be found by visually locating a big pack of boats and then trolling near them. Other boats can also help by giving out important information over the marine radio. Successful fishermen often talk to each other over the radio and report where the fish are biting. It's always a good idea to listen to the radio chatter and head for those productive areas.

Using your other electronics is another way to find the fish. Depthfinders have evolved into sophisticated pieces of equipment for the Great Lakes angler, and they often include GPS (global positioning system) functions in addition to their normal sonar capabilities. Many captains plan to head for specific GPS coordinates when they leave the marina in the morning. They can even return to a productive area from the previous day by recording and using the GPS numbers for that spot.

Once you are out on the water, watch your sonar screen closely for signs of fish. Individual salmon and trout can often be seen on the screen, so keep an eye out for the tell-tale "arcs" that indicate their presence. Silver fish (the trolling angler's term for salmon and trout) also congregate around schools of baitfish, so dark clouds of bait on the screen is another good sign. As soon as baitfish appear, stop the boat and start setting lines!

Unfortunately, there will be plenty of times when you get out to the fishing grounds and don't see anything positive on the depthfinder screen. Don't worry about it too much, as long as you have confidence in the area because of recent fishing reports or other information. Go ahead and set your lines and watch the screen for any signs of baitfish or larger fish as you troll along. It is very common to get the rods set and then see isolated pods of baitfish on your depthfinder as you are trolling along. Mark that spot with your GPS unit and then work the area thoroughly.

You certainly don't need to see fish on your screen to catch a salmon or a trout, but it doesn't hurt! Mike Schoonveld, a charter boat captain who has been fishing the southern end of Lake Michigan for many years, said, "If I had to see a fish on my sonar to be able to catch it, I'd be in big trouble -- and if I caught every fish that I saw on the screen, I'd be awful good!"