I've towed a jetski (350 lbs) in the sand but only short distances to launch it. It plows quite a bit with normal street tires. If it is hard or compacted sand you should be okay. I can't imagine 60 miles in deep, soft sand though. I guess if you had a big V8 with tow package (transmission cooler etc) you might be okay. I'd recommend bearing buddys on the trailer to keep salt water and spray out of the hubs. You might have to drive close to the water to stay on the hard pack. Oh yeah...and try to time your trip around low tide.