Options were looking slim when we rolled into Pipestone to visit a pow wow and the Pipestone National Monument. We stayed at the Calumet Inn, which is right next door to the Pizza Ranch. I made a call and found that their crust is vegan -- the folks behind the counter read the ingredients to me over the phone.
We ordered the Prairie pizza (mushrooms, onions, black and green olives, and green peppers) and added spinach, tomatoes, and jalapeños. They were happy to leave off the cheese. And we had a salad bar.
The pizza was pretty tasty, though the mushrooms came from a can. And the salad bar options were fairly limited. Given the options, though, this made for a fine meal!