lake powell Lake Powell is one of the most beautiful places in Arizona, and although it is a man made wonder, it is still an awesome way to explore the canyon country that Arizona and Utah share. Located in the northern part of the state, Lake Powell is essentially a big reservoir that serves to manage water levels for the states of Arizona, Nevada, and California, primarily. It has 2,000 miles of shoreline, and there are marinas and resorts on Lake Powell where you can rent a variety of boating equipment to enjoy a wonderful vacation, or even just a weekend. Houseboating on Lake Powell is a popular activity because of the spectacular scenery on this lake that is easily viewed from a houseboat. Since it has such a long shoreline, it is easy to pass four or five days on a houseboat on Lake Powell while taking in all the canyon walls, wildlife, and fascinating rock formations. There are also nice swimming beaches along the shoreline, and in the summer, the water is warm enough for swimming, which is good, because daytime temperatures on Lake Powell in the summer are hot.