Copyright 2013 James Marsh
Hatches and Trout Flies for the Whitewater River in Minnesota
The Whitewater River has a variety of aquatic insect hatches and a large number of terrestrials
along its banks during the summer. Imitations of both can produce trout at the right time of the
season but the trout are rarely selective about what they eat.
You can find various species of Blue-winged Olives, including baetis species, from about the
middle of March all the way through the month of September. They are generally heavier in the
early part of the year and again in the later part of that time span.
Blue quills will hatch in the moderate to fast water areas of the streams from about the middle
of April through the month of May. Hendrickson mayflies can hatch starting as early as the first
of April and lasting as long in some areas as the end of May.
Sulphurs hatch mostly in June but can be found in certain parts of the stream as early as
middle May. March browns hatch in the fast water sections of the Whitewater River from about
the middle of May through the middle of June. Light Cahill can also be found in the faster
sections of water from about the middle of June until the middle of July.
Slate Drakes exist in some parts of the stream. They hatch later in the year from about the
middle of July on into September. The Tricos represent a big hatch on many parts of the
Whitewater River. They usually start about the middle of June and can hatch as late as the last
part of September.
The first caddisfly hatches of importance are the Little Black Caddisflies. These are the
Brachycentrus species and can hatch as early as mid April and last until the middle of May,
depending on the section of water. These are moderate to fast water caddisflies.
Both spotted Sedges and Cinnamon Caddisflies exist in the Whitewater, but it has mostly
Cinnamon Caddis. They start hatching as early as May and can last until the end of
September. Little Green Caddis exist in most of the fast water areas of the stream. They are
best known for their larva stage of life. The imitations of them are called Green Rock Worms.
Trout can be taken most anytime of the year on these flies.
Don't overlook craneflies. They can be important, especially in the moderate to slow areas of
water. Imitations of the adults and larva can be effective from June through September.
Terrestrial insects are present in large quantities on many areas of the river. Imitations of
grasshoppers, ants and beetles will catch trout from about the first of June through the month
Streamers are very important flies, especially for the larger brown trout. Imitations of sculpin,
baitfish, minnows, and leeches are all effective at times, especially when the water has a little
color to it. They also work in low light conditions such as early and late in the day or on heavily
We have "Perfect Flies" that imitate every aquatic and terrestrial insect that exist on the
Whitewater River. If you haven't already done so, we invite you to give them an opportunity to
prove valuable to you. They are not only the most imitative of the insects, they are the most
effective trout flies you can purchase.
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