Anyway, I think it is a cottonwood. They are plentiful and stately along the Platte where they can drink all they want. Walk under the shade of a cottonwood stand and the summertime heat drops 20 degrees!
I’ve never seen juniper in the wild. What a beautiful and delightfully fragrant tree! According to native-languages.org, Plains Indians hung juniper boughs in their tepees or burned them in campfires to ward off storms. Some carried sprigs of juniper as a protection against grizzlies. And it was used to make medicinal amulets and to season food. Taken along the Oregon Trail.