Travelers are voting Horsetooth Reservoir, Lonetree Reservoir and Boulder Reservoir as the best of 4 lakes near Fort Collins. There are 18 lakes near Niwot a city just 30 km from Fort Collins and 5 lakes near Fort Lupton which is 34 km distant. The most popular of these are Grand Lake near Niwot and Horsetooth Reservoir in Fort Lupton. You can find 53 lakes in Colorado and 2098 lakes in the country of United States. Our members favorite in Colorado is Grand Lake and Lake Superior is the top pick in United States. Want more? Check out our map of lakes near Fort Collins.