The cottonwoods and alders on the left and ponderosas and perennial grasses on the right framed the trail as if it were the subject of a painting, drawing our eyes up the valley. Mary was celebrating the variety and vigor of the riparian understory when I saw Iris sidestep a stick ahead of us. Iris leaves no stick unturned, so my curiosity was piqued. As we approached, I could see it was a rubber boa!