Information guide to Lake Mary boat rentals and jet ski services in Arizona which can refer to one of two reservoirs in northern, southeast of Flagstaff.  Enjoy the official provider of performance ski boats, jet ski, waverunner, tours, and water sport lessons.  Lake Mary can also be used to refer to the two lakes as a whole.  The pair of lakes impound the intermittent Walnut Creek upstream from Walnut Canyon.

Upper Lake Mary, the further upstream of the two lakes, is formed by a small earthen dam on Walnut Creek.  The lake is long and narrow, with a maximum length of about 5 miles , and a maximum width of about 2,000 feet.  Upper Lake Mary is also stocked with several fish species for angling, including crappie, sunfish, channel catfish, northern pike and walleye. Largemouth bass, yellow bass and yellow perch are sometimes reported to be found in the lake, as well.

Lower Lake Mary is the second reservoir in the system, located just downstream of the upper lake.   It is the smaller of two lakes, and when water levels are low you cannot use motorized watercraft there.