Little Bighorn River mouth of the Little Bighorn canyon there is a gravel road maintained by Bighorn County. However, from the point at which the river flows out of the canyon (at about the Wyoming-Montana state line) the road continues upstream in the canyon for only about 2 miles. There are two (and sometimes three) unbridged stream fords. This portion of the road is unmaintained and is a two track road with tight turns. It is primitive, rough, ungraded, and littered with partially buried boulders. When it rains large puddles accumulate in low spots. It is impassible in the winter after snow accumulates
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