The Baltimore Checkerspot is one butterfly I rarely see even though it is said to range in the Great Lakes regions. We are the western most direction of their range I believe. They are found in bogs, wet meadows and marshes. This one was found in a wet meadow (where I was not about to enter and get wet). It was just resting.
What is interesting is the plants where they lay the eggs, Chelone glabra or turtlehead (wetland plant), Penstemon hirsutus or hairy beard tongue, Penstemon hirsutus or false foxglove, and Plantago lanceolata or English plantain. That is the place to look for them.
I am sure those south and east of me see them more frequently.