Colorado’s Cache La Poudre River begins in Rocky Mountain National Park along the Continental Divide. Sometime in the 1820s French fur trappers were caught in a tremendous snowstorm and lightened their load by burying gunpowder (poudre) in a hiding place (cache) along the riverbank. MobileBooth West facilitators Carolyn Bancroft and Karen DiMattia reached the Poudre after a four mile hike through rain, wind and some snow.