The park was created in 1981. Before this, the only national park in Saskatchewan was Prince Albert National Park. The park has some of Canada's last prairie grasslands that humans have not affected. The park's climate also lets some rare and endangered plants and animals live there. Grasslands National Park also have Canada's last black-tailed prairie dog groups. The park is also a dark-sky preserve. Grasslands National Park is the darkest dark-sky preserve in Canada. It is also one of the darkest in the world.