Emigrant Trail in Wyoming - North Platte River

North Platte River

In the eastern plains, the Emigrant Trail follows the North Platte River into Wyoming. The trail follows the river upstream to Fort Laramie, a prominent military and trading post in the region. Prior to 1850 the northern side of the river was thought to be impassable beyond Fort Laramie, so the wagon trains that were traveling on the northern side of the river through Nebraska had to undertake a dangerous crossing at the fort. After crossing, trains on the main trail to the south of the river had to cross the North Platte again 100 miles (160 km) upstream. In 1850 several wagon trains successfully blazed a path along the northern side of the river. This new route, which reduced the risk and expense of crossing the river twice, was preferred for all subsequent traffic on the northern side of the river. The northern route is sometimes called Child's Route after Andrew Child who describe it in a guide book published in 1852. Above Fort Laramie, Child's Route follows the North Platte River through the present day town of Douglas, and near the site of Fort Fetterman which was built in 1867. This is the point at which the Bozeman Trail turned north to the gold fields of Montana in the 1860s.

The southern route also follows the river along the edge of the Laramie Mountains to an area near the current towns of Casper and Glenrock. In 1847, during the first Mormon emigration, Brigham Young established a ferry near present day Casper known as Mormon Ferry. The next year the ferry was moved a few miles downriver. The ferry was free for Latter Day Saints, but charged a toll for other users. The ferry was manned by groups of Mormons every summer from 1848 until 1852. In 1853 John Baptiste Richard built a toll bridge near the ferry site, which would eventually put all ferries on the North Platte out of business. In 1859, Louis Guinard built the Platte Bridge near the site of the original Mormon Ferry. Guinard also built a trading post at one end of the bridge which eventually became Fort Caspar.

Famous landmarks along the southern route included Ayres Natural Bridge and Register Cliff, one of a number of locations along the trail in Wyoming where settlers carved their names.