Cache la Poudre River (KASH lah POO-druh), 126 mi/203 km long, N Colo.; rises at Continental Divide in NW corner of Rocky Mt. Natl. Park, Larimer co., flows N through Roosevelt Natl. Forest, E past Poudro Park, and SE past Fort Collins, Windsor, and Greely, to South Platte R. 5 mi/8 km E of Greeley. Waters sugar beet, livestock region. Receives water from Laramie R. through Laramie-Poudre (or Greeley-Poudre) Tunnel (c.2 mi/3.2 km long; finished 1911), used to irrigate 125,000 acres/50,588 ha in Larimer and Weld cos. Also called Poudre R.
