The Perfect Storm: Why Mono County Gas Prices Have Reached $7.50 On Monday, the average price of a gallon of gasoline in Mono County, California, reached $6.72, marking it as the highest county average in the United States according to data from AAA. Within this region, the rural community of June Lake—a town of 300 residents situated near Yosemite National Park and the Nevada state line—is experiencing even steeper costs.…