The St James River runs through Huron. It is special geographically, it defines

the boundary of two climate zones. East of the river recieves more rain and the

soil is richer, making it ideal for farming. To the West it is more arid and the soil

is good for the growth of grasses. Thus, ranching is done instead of farming.

The St. James is really where the West begins. ( Source SD highway marker)