155 Proclaimed or designated National Forests
20 National Grasslands
51 Purchase Units
8 Land Utilization Projects
20 Research and Experimental Areas
33 Other Areas
The first four classifications listed above are administered as 121 Forest Service Administrative Units, each headed by a Forest Supervisor. National Recreation Areas, National Forest Wildernesses, and Primitive Areas are included in the above land classifications.
36 C.F.R. §200.1