High Quality Content by WIKIPEDIA articles! The path followed by the Oregon Trail, California Trail and Mormon Trail (collectively referred to as the Emigrant Trail) spans 400 miles (640 km) through the U.S. state of Wyoming. The trail enters from Nebraska on the eastern border of the state near the present day town of Torrington and exited on the western border near the towns of Cokeville and Afton. An estimated 350,000 to 400,000 settlers traveled on the trail through Wyoming between 1841 and 1868. All three trails follow the same path through most of the state. The Mormon Trail splits at Fort Bridger and enters Utah, while the Oregon and California Trails continue to Idaho.