While fishing the Madison a couple weeks ago, my wife and had two vintage airplanes come screaming overhead while we were at West Fork. They were in close formation and at about 200' as they came over Kirby Bridge heading upriver. They both then climbed steeply and rolled out from one another before taking up a cat and mouse chase around the skies. After losing sight of them for about 10 minutes, they came barreling back down river, wings rolling left and right answering our exuberant waives. One of the pictures my wife got had the AT-6's call sign and I was able to find out that it belongs to a guy living in Cameron, MT and flying out of Ennis airport. I'm not sure what the other plane was, but it was similar. Definitely not something one see's everyday and certainly not out wading the Madison. It was cool getting buzzed!