how much snow is needed to ski
To cover several ski trails with manmade snow, you need a lot of water. According to SMI Snow Makers, it takes about 75,000 gallons (285,000 liters) of water to create a 6-inch blanket of snow covering a 200x200-foot area (61x61 meters).o cover several ski trails with manmade snow, you need a lot of water. According to SMI Snow Makers, it takes about 75,000 gallons (285,000 liters) of water to create a 6-inch blanket of snow covering a 200x200-foot area (61x61 meters).