Trout still live in the lower Cache la Poudre , the population is increasingly diminished due to marginal water flows and water quality .
Both of which greatly hinder self - sustained trout reproduction in the lower Poudre .
Although trout still live in the lower Cache la Poudre , the population is increasingly diminished due to marginal water flows and water quality , both of which greatly hinder self - sustained trout reproduction in the lower Poudre .