How to Catch A Really Big Trout on a Hot Summer Day When “The Fish Are Not Biting” Situation Occurs.
First, the character of the river and therefore, the feeding of the trout (the big ones) is affected by higher temperature and lower levels (current and velocity) of water, and by lower levels of oxygen. That is the primary factor in fishability of a venue – not the presence of other people, or even the presence of gleeful inner tubers. Our trout have their lairs established within the limited run of the canyon and the Dream Stream. They are not going anywhere. IF anything, they simply sink down and stop feeding for a moment when people float over them or a hard cast hits the water and a line combs their forehead. They don’t leave. They just hunker down for a moment. That is another story – the character of our high summer rivers.
Secondly, the character of a BIG trout in our summer river system, is one of hunkering down in a deep, cool, dark pool and sipping on larva and pupa… AND one significant other food: engulfed adult flies and terrestrials. The larger trout seek the deeper water to avoid the warmer currents. They have a limited amount of energy to spend on acquiring nourishment. The larva are actively scurrying around in the silt and moving from rock to rock seeking their own food – microscopic organisms and pieces of organic debris. The pupa of many many species are in a pre-emergent stage of absorbing oxygen directly form the water and retaining the oxygen in their wing sack, which will enhance their buoyancy when they age into the emergent stage. At this pre-emergent stage, their wings are beginning to bug out from the wing sack. So, the “nymphing pattern: to use is anything with a shiny, iridescent wing sack (bubble back emerger, flash-back emerger, etc.) with little sprouting wings. A perfect example of this stage (get ready – look in your fly box because everyone has these) – a bead-head pheasant tail pattern. Buy some flashback patterns, examine your flies to see if they are iridescent and have some sprouting wings.