When the skies look like this in September, best get the trailer hitched up and get downriver, quicklike! Dark heavy days are the catalyst for exceptional mayfly emergences, and this time of year the Hecubas and Mahoganies are ready to pop, just give them a good reason. We still have Tricos in the morning, though they could be some other little TMF, and they provide interesting target fishing first thing.
The real deal comes later. Midday when things warm up and if the weather isn’t too crappy, which sometimes can happen, the holy grail of mayflies may bless you with their presence. On some days, which we witnessed once in a five day trip, the river went absolutely bat shit crazy with bugs, followed by the fish. I made sure we were in some serious big fish water around the witching hour, and suddenly twenty to thirty pigs started slurping mayflies right before our eyes, slashing hard at the big duns. Soon enough, it is all over and the river fades back to calm, time to row out.