Travelers are voting Big Thompson River, Little Thompson River and Spring Creek as the best of 7 rivers near Fort Collins. There are 15 rivers near Niwot a city just 30 km from Fort Collins and 8 rivers near Fort Lupton which is 34 km distant. The most popular of these are Colorado River near Niwot and Boulder Creek in Fort Lupton. You can find 74 rivers in Colorado and 3913 rivers in the country of United States. Our members favorite in Colorado is Boulder Creek and Mississippi River is the top pick in United States. Want more? Check out our map of rivers near Fort Collins.