Lac St. Pierre, St. Lawrence River, Quebec

Location: Lac St. Pierre, St. Lawrence River, Quebec
GPS: N 46° 06.506’    W 072° 59.428’
Species: Largemouth and Smallmouth Bass, Walleye and Pike

This Hotspot is a very specific breakline on Lac St. Pierre on the St. Lawrence River in Quebec. It’s a major feeding area for Largemouth and Smallmouth Bass, as well as Walleye and Pike.

The current is deceivingly strong here, so drifting baits very close to the bottom is the key. Tube jigs are the #1 choice here followed by curly-tailed grubs and drop shot finesse worms. Experiment with colours as the fish’s preferences seem to change daily.

4 Replies to “Lac St. Pierre, St. Lawrence River, Quebec”

  1. By now, most of us have heard about and seen the movie “Ace Ventura : Pet Detective”. Well, all you angling type movie buffs can now look forward to the (tackle) box office smash hit, “Ace Venturi : Fish Detective”, now playing at Lac St. Pierre in the St. Lawrence River and other vicinities near you. That’s right the “Venturi Effect”. It’s the increase in current flow and reduction in water pressure that results when a water flows through a constricted section (or choke) of a river.

    Let me give you some background from what I have managed gather on the internet….

    In fluid dynamics, an incompressible fluid’s velocity (water in this instance) must increase as it passes through a constriction (venturi) in accord with the principle of mass continuity, while its static pressure must decrease in accord with the principle of conservation of mechanical energy. Thus any gain in kinetic energy a fluid may accrue due to its increased velocity through a constriction is balanced by a drop in pressure.

    The limiting case of the Venturi effect is when a fluid reaches the state of choked flow. When a fluid system is in this state , a further decrease in the downstream pressure environment will not lead to an increase in the mass flow rate. However, mass flow rate for a compressible fluid will increase with increased upstream pressure, which will increase the density of the fluid through the constriction (though the velocity will remain constant). This is the principle of operation of a de Laval nozzle. Increasing source temperature will also increase the local sonic velocity, thus allowing for increased mass flow rate but only if the nozzle area is also increased to compensate for the resulting decrease in density…..Confused yet?….Yeah, me To!

    One thing for certain, between these elongated islands in the St. Lawrence River, “The Venturi Effect” causes a drop in water pressure and increases current velocity drawing in the bait fish. Predatory monstocities love this kind of action.

    Angelo stated, “This Hotspot is a very specific breakline on Lac St. Pierre on the St. Lawrence River in Quebec. It’s a major feeding area for Largemouth and Smallmouth Bass, as well as Walleye and Pike. The current is “DECEIVINGLY STRONG” here, so drifting baits very close to the bottom is the key….BINGO !! A fishing bonanza!!

    I should warn you, be very careful how you approach these types of elongated islands whether in a river such as this, or in any lake. I found out the hard way while fishing with my spouse up on Lake Kagawong in Manitoulin Island. With the outboard motor at half speed up, we approached a large elongated island in the middle of the lake toward it’s narrow end….Big mistake! The water quickly shallowed out to 3 feet and we were still more than a 100 yards or so from the island. The outboard slammed into the rocks below. In a panic, I killed the motor and flipped it up out of the water to check the lower unit. Fortunately, the “Skeg” took the brunt of the hit. The propeller was undamaged!….Dang, that was close, because we were quite a ways out. Rescue would have been a matter of rowing about five kilometers.

    You might want to check out “The Venturi Effect” Hot Spot in Lake Wosley on Manitoulin Island where the water passes through an “isthmus” causeway and drains into Campbell Bay. An isthmus is a narrow piece of land connecting two larger areas across an expanse of water by which they are otherwise separated. The nonstop fishing action here is always quite intense with several boats always in the area.

    So all you adventurous daredevil types, are you looking for a fast paced fishing adventure? Something that will make the hair stand up on the back of your necks? An “Island Adventure” of sorts that will not only test your angling skills, but your intestinal fortitude as well….?!

    The action packed “Venturi Effect” is sure to leave you spell bound! It is worth the price of admission!

Leave a Reply

Back to top