Cache la Poudre

About

Cache la Poudre River, Colorado — 1864 Fort Collins, 1986 Wild and Scenic, 1976 Big Thompson. Long before the name, the watershed was Arapaho and Ute territory. The French phrase that stuck came from an 1836 incident, when fur traders sheltering through a blizzard cached gunpowder in the riverbanks — hide the powder — and the river has answered to "Cache la Poudre" ever since.

From the 1830s through the 1920s, the watershed was logged to feed the regional timber industry of the 1850s–1910s and the railroad expansion of the 1860s–1910s. Local sawmills, logging drives, and downstream lumber operations were the major operators. The pattern ran until the old-growth stands were exhausted around 1910; state forestry conservation began in 1915, and the establishment of state forests in the 1930s ended large-scale logging in the corridor.

The river's defining chapter opened in 1864, when the U.S. Army established Fort Collins at the river's canyon mouth to protect overland travelers. That posting made the Poudre the founding waterway of Colorado's north-central settlement corridor. For more than a century afterward, its water irrigated and supplied the towns that grew along it — Fort Collins, Greeley, and the farming communities of the South Platte valley. The Poudre remains the principal water supply for those cities and their agricultural neighbors, and it is one of the most popular wild trout streams in the Front Range.

The watershed's flood history is written in hard numbers. The 1976 Big Thompson flood — one of Colorado's deadliest natural disasters, killing 144 people per the USGS PP1115 publication — remains a defining event in the basin. In September 2013, a catastrophic rainfall event, described as a 500-year event, sent the Poudre over 6,000 cfs, destroying roads and access points throughout the canyon and reshaping portions of the riverbed.

Protection came out of a fight over water. After years of advocacy driven by concern over proposed dams, Congress in 1986 designated the Cache la Poudre as Colorado's first and only National Wild and Scenic River, safeguarding 75 miles of the corridor under the National Wild and Scenic Rivers Act. The U.S. Forest Service manages the reach within Roosevelt National Forest and published its Cache la Poudre Wild & Scenic River Plan in 2004. Today the river also anchors the Cache la Poudre River National Heritage Area, a forty-five-mile stretch reaching from where the water leaves Roosevelt National Forest northwest of Fort Collins to its confluence with the South Platte east of Greeley — a corridor binding mountain headwaters to working plains.

For paddlers, the canyon breaks into distinct character. The Upper Canyon is technical Class IV. The Lower Canyon, from Ted's Place to Poudre Park, eases to Class II–III, and the run from Mishawaka to Fort Collins settles into Class I–II. Meanwhile, the 2010s brought a coordinated recovery effort: regional watershed partnerships have addressed more than a century of logging, agricultural, and industrial impacts through streambank stabilization, native fish restocking, nutrient reduction, and water-quality improvements carried out between 2015 and 2024.