After leaving the North Platte River near present-day Mills, Wyo., Oregon Trail travelers journeyed 10 miles or so through windswept, sometimes rocky terrain before coming through a shallow pass, now known as Emigrant Gap. Beyond it, at the base of a hill lay Mineral Lake, an alkali pond.
The amazing sight of Ayres Natural Bridge, a natural limestone arch across La Prele Creek near Douglas, Wyo., inspired numerous Oregon Trail emigrants to comment in their diaries. California-bound Cephas Arms on July 4, 1849, described it as “one of the wildest scenes I ever beheld.”
About 70 miles northwest of Fort Laramie, the Oregon Trail crossed La Prele Creek, flowing north from the Laramie Range toward the North Platte River a few miles away. On a high bluff above the creek mouth the U.S. Army in 1867 would build Fort Fetterman, which became an important supply base in the wars with the Cheyenne and Lakota Sioux in the following decade.
In July 1864, several members of the Kelly-Larimer wagon train were killed by a large party of Oglala Sioux. The graves of five victims—7-year-old Mary Kelly and four men—are located near present Glenrock, Wyo. Fanny Kelly, held captive by the Sioux, later wrote a book about her trials.
At Red Buttes, west of present Casper, Wyo., Oregon Trail travelers left the North Platte River and started for the Sweetwater and the Continental Divide. Long a boundary marker for tribes, the spot quickly became well known to emigrants for its beauty and for marking a new stage of the journey.
Three-year-old Ada Magill of Kansas, died of dysentery in 1864 on the Oregon Trail west of present Glenrock, Wyo. The Magills were bound for Oregon. In 1912, road surveyor L. C. Bishop moved the grave to a site nearby, where it is now marked by the Oregon-California Trails Association.
On a jittery night in 1864, a lone warrior stole three horses from a California-bound wagon train west of present Glenrock, Wyo. Early next morning, emigrant Martin Ringo died from an accidental gunshot. His grave is still there, on private land. Johnny Ringo, his son, was later a famous outlaw.
Many Oregon Trail diarists noted the distinctive, conical shape of 70-foot-high Knob Hill, southwest of present Douglas, Wyo., and compared it to a sugar loaf; others whetted their knives on rocks at its base. British travel writer Richard Burton was skeptical of the tale that Brigham Young had preached a sermon there.