Big Rainbows on Lake Koocanusa: Captain Bob Orsua’s Fishing Report
By Matt Schauer

Posted: April 5, 2012

April Mack’s

Fishing for lake trout on Flathead Lake in the month of April can be a bit frustrating. April is a transition month. The spring runoff is the major player. The amount of runoff and how quickly the snow melts will dictate where and how we fish the north end of Flathead Lake.

Recently we have been fishing the east side of the center bar in the 200 ft plus area.

Trolling flatfish on the bottom is still the lure of choice. Try downsizing to the U-20 from Worden’s. I like the Luminous green strip, fire tiger, and the white with the red head.

When we start fishing further north near the river mouth I like to use a dodger from Gold Star in size #0, color #790 or 792, then attach a 23” 25lb. mono leader with a mother of pearl #35 Octopus (41/4”) or in a double glow #8034.

Also try a F-2 flasher from Silver Horde to create a larger area of flash and more action to your houchies or fly.

Lake Koocanusa

Fishing for the big rainbows in Lake Koocanusa in the spring offers a great cure for spring fever.

The number of fish per day this time of year is in the 8 -12 fish per day, not bad!

The rainbows seem to average in the 6-10 lb. range.

Try fishing the shoreline with Rapala’s that imitates a small Kokanee salmon. Cross the lake while fishing the center area of the lake pulling your favorite Lyman plugs in spring colors. Remember bright day’s bright lures.

Your can fish for the bull trout but you can’t keep any, catch and release only.


Remember –  NO BAD DAYS

This Tight lines posted was provided by Capt. Bob Orsua, of Mo Fisch Charters.  Stop by their website at

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