Oregon Trail Road starts 15 miles west of Casper off Poison Spider Road. Heading south the trail passes the Oregon Trail Pet Cemetery and the Avenue of Rocks, where W.H. Stephens of Winnebago County, Illinois, carved his name on July 5, 1849. A day later, he carved his name at Independence Rock. Later, the trail takes you past Willow Springs and Prospector Hill. The trail parallels State Highway 220 and eventually merges with it roughly 48 miles south of Casper and 10 miles north of Independence Rock.
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