Little Bighorn River fishing websites to conclude: "However, the Little Bighorn runs entirely within the boundaries of the Crow Reservation and access to it is next to nil." The prospective fisherman should not be misled by the fact that the blue ribbon trout fishery on the Big Horn River, below the Yellowtail Dam, is fished by non-Indians (provided the non-member complies with Montana fishing regulations and laws), though this stretch of the Bighorn River is within the boundaries of the Crow Reservation. In the seminal case of Montana v. United States, 450 U.S. 544 (1981), the court exempted the Big Horn River from
Bighorn sheep both indicated on Clark's map and did retain their names, the latter being the namesake of the Battle of the Little Bighorn. Bighorn sheep The bighorn sheep ("Ovis canadensis") is a species of sheep native to North America named for its large horns. These horns can weigh up to , while the sheep themselves weigh up to . Recent genetic testing indicates three distinct subspecies of "Ovis canadensis", one of which is endangered: "O. c. sierrae". Sheep originally crossed to North America over the Bering land bridge from Siberia; the population in North America peaked in the millions, and the