Ham's Fork flows into Black's Fork about a mile southwest of Granger,
Wyoming. The trail crossed Ham's Fork about a mile above the junction of
the two rivers, but the crossing moved around over the years. In 1857 a
bridge was constructed by the army which was located near the mouth of the
river. A Pony Express station was later located near the site of the bridge. An early variant of the trail came fifteen miles directly to Ham's fork from the Green River hitting it about seven miles upstream of its junction with Black's Fork. It then followed down Ham's Fork for a few miles, crossed it and headed southwest to meet Black's Fork nearer Church Butte.