Sloan’s Lake Park wraps around Denver’s largest lake, where joggers, paddlers and picnickers share 177 acres of water framed by the downtown skyline on one side and the Front Range sunset on the other.

The lake was born by accident. According to local legend told by the Denver Public Library, homesteader Thomas M. Sloan was digging an irrigation well in 1861 when he tapped an aquifer, and water spread across his farmland almost overnight. Locals joked about “Sloan’s Leak,” but the lake soon drew boaters, swimmers and skaters. From 1891, the north shore held Manhattan Beach, billed as the largest amusement park west of the Mississippi, with a roller coaster, theater, zoo and a pleasure barge; renamed Luna Park, it closed for good in 1914.

Today Sloan’s Lake is Denver’s second-largest park and its most active lake. Two connected lakes, Sloan’s and Cooper, average about eight feet deep, and it is the only lake within city limits that allows fuel-powered motorized boating, with counterclockwise traffic and a 40 mph limit. A paved path circles the shore past playgrounds, sports fields and picnic spots, and Penny Island shelters waterfowl. Each summer the Colorado Dragon Boat Festival takes over the water. Round out a city day at Confluence Park, Meow Wolf Denver or Union Station, or compare lake loops at Washington Park.

Insider tip: Come at golden hour. The west side looks back at the downtown skyline, and the east shore faces the mountains for some of Denver’s best sunsets. Parking lots ring most of the lake, but the boating office (4700 W. Byron Place) is staffed only in boating season, and no fishing is allowed from boats.

The Colorado Dragon Boat Festival returned to Sloan’s Lake on August 29-30, 2026, and Denver Parks and Recreation has been gathering public input on improvements to the Sloan’s Lake boat house. Boating rules, permits and seasonal hours are posted at denvergov.org.