Upper Lake Mary, located in Coconino, Arizona, is a captivating destination for water resource and climate enthusiasts. This local government-owned reservoir, completed in 1941, serves primarily for recreation and water supply purposes. With a capacity of 21,041 acre-feet and a surface area of 1,058 acres, Upper Lake Mary is a significant water source in the region, drawing from a drainage area of 54.3 square miles.

Standing at a height of 38 feet with a structural height of 49 feet, the earth dam on Upper Lake Mary impounds water from Walnut Creek. The reservoir boasts a spillway width of 360 feet and a maximum discharge capacity of 11,000 cubic feet per second. Despite its significant hazard potential, the dam's condition assessment in 2015 deemed it satisfactory, ensuring the safety and stability of the structure for water storage and recreational activities.

With its scenic location near Walnut Canyon National Monument and I-40, Upper Lake Mary offers a serene and picturesque setting for outdoor enthusiasts. The reservoir's moderate risk assessment and regular inspection schedule, every three years, highlight its commitment to safety and environmental stewardship. Whether for boating, fishing, or simply enjoying the natural beauty of the area, Upper Lake Mary is a must-visit destination for those interested in water resources and climate conservation.