The Cache La Poudre's headwaters are in the Front Range, in the northern part of Rocky Mountain National Park. The river descends eastward in the mountains through the Roosevelt National Forest in Poudre Canyon. It emerges from the foothills north of the city of Fort Collins. The river is a popular summer destination for fly fishing, whitewater rafting, tubing, and kayaking in the Poudre Canyon. The river is subject to sudden and devastating floods which often impact nearby communities. A flood in 1864 destroyed the military post, Camp Collins, located near the river at La Porte. The military relocated the camp and renamed it Fort Collins. Although no fort was ever built, the current city of Fort Collins was established and continues to battle the periodic flooding of the Cache La Poudre.