Which class of airspace is the area within 5 miles of Barnes County Airport classified as?

The area within 5 miles of Barnes County Airport is classified as Class G airspace from the surface up to but not including 700 feet AGL. Class G airspace is generally uncontrolled airspace and extends from the ground up to the base of the overlying controlled airspace. At many airports, especially those without control towers, the airspace surrounding them can remain as Class G.

In the case of Barnes County Airport, if it does not have an operational control tower, then the airspace within that 5-mile radius is indeed Class G. This airspace allows for more flexibility in flight operations, especially for small unmanned aircraft systems, as it provides minimal regulatory restrictions.

Class B, Class C, and Class D airspaces are all controlled airspaces that have specific operational requirements and are typically around airports with higher traffic densities or operational control towers, which would not apply in this scenario for locations without such facilities.