Sioux Chief is located just outside Peculiar, MO.
You can best reach Peculiar by US-71 highway.
At the Peculiar exit (Junction of Highways C and J), turn West and follow Highway C on through the town, where its also called Main Street.
South of town, Highway C/Main forks, with Old Highway 71 to the left and Highway C continuing to the right. Take Old 71 south until you reach the Sioux Chief complex, which will be on the right.