Idle Hour Lake, also known as Altamont Dam, is a picturesque reservoir located in Chetopa, Labette County, Kansas. Owned by the local government, this man-made lake was completed in 1925 for the primary purpose of recreation. The dam, standing at a height of 14 feet with a hydraulic height of 13 feet, boasts a length of 600 feet and a storage capacity of 120 acre-feet.

Situated along Hackberry Creek, Idle Hour Lake offers a serene escape for water resource and climate enthusiasts. The dam, built in a buttress core type with an unspecified foundation, poses a low hazard potential. While it is not currently rated for its condition, the lake is a popular destination for outdoor activities such as fishing, boating, and picnicking. The surrounding area, with a normal storage capacity of 70 acre-feet, provides ample space for recreational enjoyment and environmental appreciation.

With its tranquil waters and lush surroundings, Idle Hour Lake is a hidden gem for those seeking a peaceful retreat in the heart of Kansas. Despite its modest size and limited regulatory oversight, the lake serves as a valuable resource for the local community and visitors alike. Whether you're a nature lover, angler, or simply looking to unwind in a natural setting, this charming reservoir offers a delightful blend of relaxation and outdoor adventure.