Directions

Big Spring Range



There is no actual address for the old testing grounds but it is located right across the road from 4921 Highway 146, Searsboro, IA 50242 at the top of hill. It is an old corn crib with mowed and landscape yard with plenty of grass land around it.

On I80 take the Grinnell exit #182 and head south on Highway 146 for approximately 9 miles south.