About Pymatuning Adventure Resort Pymatuning Adventure Resort is in Ashtabula County in northern Ohio, about 50 miles east of Cleveland and only 30 miles south of Lake Erie. The great Pymatuning Lake, a superior walleye fishery, is only feet away from the campground, although the Pymatuning State Park lies between the resort and the lake, necessitating a short detour. For fun on the big lake, our campground has its own fishing boats and pontoon boats for members and guests, docked conveniently nearby. Resort personnel will escort guests to the boats, give them operation instructions and see them off safely. We also have a very nice clubhouse for everyone, with a well-stocked game room, TVs and more.