Mariposa lilies are in bloom now in this area. USDA Plants shows 56 species of Calochortus, all of them confined to the 14 western-most states plus British Columbia and Alberta.
There are many variations in the blossoms even within the same species, but I think they are all beautiful. (I also reserve the right to be completely wrong in my species identifications of them.)
Pointedtip mariposa lily, Three-spot Mariposa lily, Baker’s mariposa lily, Calochortus apiculatus
Elegant mariposa lily, Northwerstern mariposa lily, Elegant cat’s ear, Calochortus elegans
Montana Outdoors 