Montana rogue Rusty Vorous once told me about a scientifically proven way for judging the intelligence levels of guide trip clients at the onset of your trips: The larger the brim on a client’s recently-purchased shiny white Stetson cowboy hat, the lower the client’s IQ.

Once it passes toilet seat proportions, you can bet it will indeed be a very long day on the river.

Rusty was accurate, by my calculations, to within 1/8 inch.