Copyright 2013 James Marsh
Hatches and Trout Flies for the White River Colorado
The hatches vary some depending on the section of the river but the insects listed below
are plentiful throughout most of the stream from its headwaters to its lower section near
Meeker. During the early season, before runoff, the main hatches consist of Western
March Browns and Blue-winged Olives. The BWOs can start as early as March but April
usually is the most consistent time for the hatch to begin. There's also a Fall hatch of the
BWOs. It usually takes place from late September and throughout most of the month of
October.

Of course, midges will work well anytime the water is too cold for most other insects.
There's also plenty of small black winter stoneflies that hatch in the early season, even
when there's snow on the ground.

You will find some hatches of Salmonflies become to come off in late June to early July.
Sometimes the runoff effects the fishing conditions during the hatch and on other years it
misses it. It all depends on the snowpack. LIttle Yellow Stoneflies are also plentiful in some
areas in late July and early August. Within a week or two of the end of the Salmonfly hatch
in early July, you will usually find Golden Stoneflies beginning to hatch. The hatch last into
the month of August, depending on the location on the river. Both the Salmonflies and
Golden Stoneflies start hatching in the lower section and move upstream as the days go
by.  

The first caddisflies to hatch are the Little Black Caddis, called the Mothers Day hatch in
most places in the West. This hatch starts in the lower section of the river in late April and
last about a month. In late June and early July, there's plenty of Spotted Sedges that begin
to hatch. These are the most plentiful of the caddisflies and the different species hatch
throughout most of the Summer.

The next most important caddisfly hatch are the Green Sedges. They hatch from May
through August, depending on the species. Imitations of the Green Rock Worms, or their
larvae, work year-round.

In late June, usually before the runoff ends, Pale Morning Duns will start hatching. There
are a few Green Drakes that hatch but the numbers are usually fairly low. There are also
some Flavs, or Small Western Green Drakes, but the numbers of them are relatively low.
The PMD hatch will last most of the summer and is the most consistent mayfly hatch. In
some areas of the fast water you will find some Pink Ladies that hatch in late August and
September.

Late Summer, in August and September, terrestrials will play an important role in the trout's
diet. Don't forget imitations of grasshopper, ants and beetles.
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White River Colorado
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