1851 and 1861 Treaty Lands Lands granted to the Cheyenne and Arapaho peoples under the 1851 Treaty of Fort Laramie and 1861 Treaty of Fort Wise. Map POINT (-107.6072505 38.1005117) Image by National Park Service Date Februrary, 2014 Copyright Notes This image is in the public domain as per Park Ranger Eric Sainio.