pronghorn sheep near the lamar river stock cutoff trail parking lot

212 america american animal animals antelope antilocapridae buck country cutoff elements entrance eventoed fast fawn getaway herd herding herds hoof hooves horn horns lamar lot mammal mammals national nature park parking places prairie prey prong pronghorn river road run runner runners seasons sheep snow species state states stock trail travel trip united usa vacation valley white wild wildlife winter wyoming yellowstone