Yavapai County is located near the center of the U.S. state of Arizona. As of the 2010 census, its population was 211,073. The county seat is Prescott. Yavapai County comprises the Prescott, AZ Metropolitan Statistical Area.
Located between the Patapsco and the Potomac, the Patuxent River covers over 957 square miles, and bears the distinction of being the longest river exclusive to Maryland. Patuxent River with Solomons Island Bridge in distance (from St. Mary's County), Maryland, May 2000.
Canyon Ferry Reservoir is located approximately 20 miles east of Helena. The dam and visitor center is located at the north end of the lake. From Helena, take Highway 12/287 past East Helena and to the blinking light at the intersection of Highways 12/287 and 284. Turn onto Highway 284.