Willow Creek, also known as Steamboat Lake, is a state-regulated dam located in Routt, Colorado. Constructed in 1966, this Earth-type dam stands at a height of 100 feet and spans 700 feet in length, creating a reservoir with a maximum storage capacity of 36,900 acre-feet. The primary purpose of this dam is for recreational use, offering a surface area of 1,011 acres for water enthusiasts to enjoy.

With a high hazard potential and fair condition assessment, Willow Creek is regularly inspected by the Colorado Department of Water Resources to ensure its safety and effectiveness. The dam's spillway, with a width of 98 feet, helps manage the reservoir's water levels and prevent overflow during periods of high discharge. Despite moderate risk factors, the dam continues to serve as a key water resource for the surrounding area and remains a popular destination for outdoor activities.