Acreages of Special Designated Areas within National Forest System lands with single designations and Special Designated Areas within National Forest  System lands  with multiple designations stratified by Inventoried Roadless Area categories within Regions
 All acreage figures are rounded to the nearest 1,000 and are mutually exclusive (i.e. acreages are not double counted).
National Summary IRA Categories Sum
Inventoried Roadless Areas where road construction is Prohibited Inventoried Roadless Areas recommended for wilderness Inventoried Roadless Areas where road construction is allowed
acres (1,000) acres (1,000) acres (1,000) acres (1,000)
Areas with single designations NGRWP     56 56
NHA        
NM 79     79
NPA        
NRA 214 212 749 1,175
NSA 51     51
NVM 25   2 27
NWA        
NWSR 81   81 162
NSRA 1   2 3
OCD 1,266 16 50 1,332
RNA 166 28 55 249
WSA 782 1,820 194 2,796
Areas with multiple designations NM NWSR 4     4
NM OCD 23     23
NM OCD NWSR 2     2
NM RNA        
NRA NWSR 11   11 22
NRA RNA 4     4
NWSR OCD 1     1
NWSR RNA     1 1
NWSR WSA        
OCD NRA 1     1
OCD RNA 12     12
WSA NSA   7   7
WSA RNA 5   3 8
Sum 2,728 2,083 1,205 6,015
SDA Categories
NPA - National Primitive Area                  NVM - National Volcanic Monument
NSRA - National Scenic Research Area                  NHA - National Historic Area
NSA - National Scenic Area                  WSA - Wilderness Study Area
NWSR - National Wild & Scenic Rivers                  RNA - Research Natural Area
NRA - National Recreation Area                  NWA - National Widerness  Area
NM - National Monument                  OCD - Other Congressionally Designated Areas
NGRWP - National Game Refuge/Wildlife Preserve    
REGION 1 IRA Categories Sum
Inventoried Roadless Areas where road construction is Prohibited Inventoried Roadless Areas recommended for wilderness Inventoried Roadless Areas where road construction is allowed
acres (1,000) acres (1,000) acres (1,000) acres (1,000)
Areas with single designations NGRWP        
NHA        
NM        
NPA        
NRA   15   15
NSA 5     5
NVM        
NWA        
NWSR 1   22 22
NSRA        
OCD 35 16   52
RNA 20 10 29 58
WSA 341 55 194 590
Areas with multiple designations NM NWSR        
NM OCD        
NM OCD NWSR        
NM RNA        
NRA NWSR        
NRA RNA        
NWSR OCD        
NWSR RNA     1 1
NWSR WSA        
OCD NRA        
OCD RNA        
WSA NSA   7   7
WSA RNA 5   3 8
Sum 406 104 247 757
SDA Categories
NPA - National Primitive Area                  NVM - National Volcanic Monument
NSRA - National Scenic Research Area                  NHA - National Historic Area
NSA - National Scenic Area                  WSA - Wilderness Study Area
NWSR - National Wild & Scenic Rivers                  RNA - Research Natural Area
NRA - National Recreation Area                  NWA - National Widerness  Area
NM - National Monument                  OCD - Other Congressionally Designated Areas
NGRWP - National Game Refuge/Wildlife Preserve    
REGION 2 IRA Categories Sum
Inventoried Roadless Areas where road construction is Prohibited Inventoried Roadless Areas recommended for wilderness Inventoried Roadless Areas where road construction is allowed
acres (1,000) acres (1,000) acres (1,000) acres (1,000)
Areas with single designations NGRWP     18 18
NHA        
NM        
NPA        
NRA 6   52 59
NSA        
NVM        
NWA        
NWSR 4   11 15
NSRA        
OCD 128     128
RNA 14 2 2 18
WSA   13   13
Areas with multiple designations NM NWSR        
NM OCD        
NM OCD NWSR        
NM RNA        
NRA NWSR        
NRA RNA 1     1
NWSR OCD        
NWSR RNA        
NWSR WSA        
OCD NRA 1     1
OCD RNA        
WSA NSA        
WSA RNA        
Sum 154 15 83 252
SDA Categories
NPA - National Primitive Area                  NVM - National Volcanic Monument
NSRA - National Scenic Research Area                  NHA - National Historic Area
NSA - National Scenic Area                  WSA - Wilderness Study Area
NWSR - National Wild & Scenic Rivers                  RNA - Research Natural Area
NRA - National Recreation Area                  NWA - National Widerness  Area
NM - National Monument                  OCD - Other Congressionally Designated Areas
NGRWP - National Game Refuge/Wildlife Preserve    
REGION 3 IRA Categories Sum
Inventoried Roadless Areas where road construction is Prohibited Inventoried Roadless Areas recommended for wilderness Inventoried Roadless Areas where road construction is allowed
acres (1,000) acres (1,000) acres (1,000) acres (1,000)
Areas with single designations NGRWP     39 39
NHA        
NM        
NPA        
NRA 1   44 45
NSA        
NVM        
NWA        
NWSR 6   8 14
NSRA        
OCD 27     27
RNA 1     1
WSA 47 125   172
Areas with multiple designations NM NWSR        
NM OCD        
NM OCD NWSR        
NM RNA        
NRA NWSR        
NRA RNA        
NWSR OCD        
NWSR RNA        
NWSR WSA        
OCD NRA        
OCD RNA        
WSA NSA        
WSA RNA        
Sum 82 125 91 298
SDA Categories
NPA - National Primitive Area                  NVM - National Volcanic Monument
NSRA - National Scenic Research Area                  NHA - National Historic Area
NSA - National Scenic Area                  WSA - Wilderness Study Area
NWSR - National Wild & Scenic Rivers                  RNA - Research Natural Area
NRA - National Recreation Area                  NWA - National Widerness  Area
NM - National Monument                  OCD - Other Congressionally Designated Areas
NGRWP - National Game Refuge/Wildlife Preserve    
REGION 4 IRA Categories Sum
Inventoried Roadless Areas where road construction is Prohibited Inventoried Roadless Areas recommended for wilderness Inventoried Roadless Areas where road construction is allowed
acres (1,000) acres (1,000) acres (1,000) acres (1,000)
Areas with single designations NGRWP        
NHA        
NM        
NPA        
NRA 89 197 335 621
NSA        
NVM        
NWA        
NWSR     5 5
NSRA 1   2 3
OCD        
RNA 37 16 21 74
WSA        
Areas with multiple designations NM NWSR        
NM OCD        
NM OCD NWSR        
NM RNA        
NRA NWSR        
NRA RNA 2     2
NWSR OCD        
NWSR RNA        
NWSR WSA        
OCD NRA        
OCD RNA        
WSA NSA        
WSA RNA        
Sum 129 213 363 704
SDA Categories
NPA - National Primitive Area                  NVM - National Volcanic Monument
NSRA - National Scenic Research Area                  NHA - National Historic Area
NSA - National Scenic Area                  WSA - Wilderness Study Area
NWSR - National Wild & Scenic Rivers                  RNA - Research Natural Area
NRA - National Recreation Area                  NWA - National Widerness  Area
NM - National Monument                  OCD - Other Congressionally Designated Areas
NGRWP - National Game Refuge/Wildlife Preserve    
REGION 5 IRA Categories Sum
Inventoried Roadless Areas where road construction is Prohibited Inventoried Roadless Areas recommended for wilderness Inventoried Roadless Areas where road construction is allowed
acres (1,000) acres (1,000) acres (1,000) acres (1,000)
Areas with single designations NGRWP        
NHA        
NM 79     79
NPA        
NRA 51   16 67
NSA 11     11
NVM        
NWA        
NWSR 32   16 48
NSRA        
OCD 23   7 29
RNA 31     31
WSA        
Areas with multiple designations NM NWSR 4     4
NM OCD 23     23
NM OCD NWSR 2     2
NM RNA        
NRA NWSR 10   10 19
NRA RNA        
NWSR OCD 1     1
NWSR RNA        
NWSR WSA        
OCD NRA        
OCD RNA 1     1
WSA NSA        
WSA RNA        
Sum 268   48 316
SDA Categories
NPA - National Primitive Area                  NVM - National Volcanic Monument
NSRA - National Scenic Research Area                  NHA - National Historic Area
NSA - National Scenic Area                  WSA - Wilderness Study Area
NWSR - National Wild & Scenic Rivers                  RNA - Research Natural Area
NRA - National Recreation Area                  NWA - National Widerness  Area
NM - National Monument                  OCD - Other Congressionally Designated Areas
NGRWP - National Game Refuge/Wildlife Preserve    
REGION 6 IRA Categories Sum
Inventoried Roadless Areas where road construction is Prohibited Inventoried Roadless Areas recommended for wilderness Inventoried Roadless Areas where road construction is allowed
acres (1,000) acres (1,000) acres (1,000) acres (1,000)
Areas with single designations NGRWP        
NHA        
NM        
NPA        
NRA 12   268 280
NSA 27     28
NVM 25   2 27
NWA        
NWSR 34   13 47
NSRA        
OCD 210   43 253
RNA 25   3 29
WSA   15   15
Areas with multiple designations NM NWSR        
NM OCD        
NM OCD NWSR        
NM RNA        
NRA NWSR     1 2
NRA RNA 1     1
NWSR OCD        
NWSR RNA        
NWSR WSA        
OCD NRA        
OCD RNA 1     1
WSA NSA        
WSA RNA        
Sum 337 15 332 683
SDA Categories
NPA - National Primitive Area                  NVM - National Volcanic Monument
NSRA - National Scenic Research Area                  NHA - National Historic Area
NSA - National Scenic Area                  WSA - Wilderness Study Area
NWSR - National Wild & Scenic Rivers                  RNA - Research Natural Area
NRA - National Recreation Area                  NWA - National Widerness  Area
NM - National Monument                  OCD - Other Congressionally Designated Areas
NGRWP - National Game Refuge/Wildlife Preserve    
REGION 8 IRA Categories Sum
Inventoried Roadless Areas where road construction is Prohibited Inventoried Roadless Areas recommended for wilderness Inventoried Roadless Areas where road construction is allowed
acres (1,000) acres (1,000) acres (1,000) acres (1,000)
Areas with single designations NGRWP        
NHA        
NM        
NPA        
NRA 14   15 29
NSA 8     8
NVM        
NWA        
NWSR 3   6 9
NSRA        
OCD        
RNA 7     7
WSA 14 21   36
Areas with multiple designations NM NWSR        
NM OCD        
NM OCD NWSR        
NM RNA        
NRA NWSR        
NRA RNA        
NWSR OCD        
NWSR RNA        
NWSR WSA        
OCD NRA        
OCD RNA        
WSA NSA        
WSA RNA        
Sum 46 21 22 89
SDA Categories
NPA - National Primitive Area                  NVM - National Volcanic Monument
NSRA - National Scenic Research Area                  NHA - National Historic Area
NSA - National Scenic Area                  WSA - Wilderness Study Area
NWSR - National Wild & Scenic Rivers                  RNA - Research Natural Area
NRA - National Recreation Area                  NWA - National Widerness  Area
NM - National Monument                  OCD - Other Congressionally Designated Areas
NGRWP - National Game Refuge/Wildlife Preserve    
REGION 9 IRA Categories Sum
Inventoried Roadless Areas where road construction is Prohibited Inventoried Roadless Areas recommended for wilderness Inventoried Roadless Areas where road construction is allowed
acres (1,000) acres (1,000) acres (1,000) acres (1,000)
Areas with single designations NGRWP        
NHA        
NM        
NPA        
NRA 33   19 52
NSA        
NVM        
NWA        
NWSR 1     1
NSRA        
OCD        
RNA 3     3
WSA        
Areas with multiple designations NM NWSR        
NM OCD        
NM OCD NWSR        
NM RNA        
NRA NWSR 1     1
NRA RNA        
NWSR OCD        
NWSR RNA        
NWSR WSA        
OCD NRA        
OCD RNA        
WSA NSA        
WSA RNA        
Sum 38   19 58
SDA Categories
NPA - National Primitive Area                  NVM - National Volcanic Monument
NSRA - National Scenic Research Area                  NHA - National Historic Area
NSA - National Scenic Area                  WSA - Wilderness Study Area
NWSR - National Wild & Scenic Rivers                  RNA - Research Natural Area
NRA - National Recreation Area                  NWA - National Widerness  Area
NM - National Monument                  OCD - Other Congressionally Designated Areas
NGRWP - National Game Refuge/Wildlife Preserve    
REGION 10 IRA Categories Sum
Inventoried Roadless Areas where road construction is Prohibited Inventoried Roadless Areas recommended for wilderness Inventoried Roadless Areas where road construction is allowed
acres (1,000) acres (1,000) acres (1,000) acres (1,000)
Areas with single designations NGRWP        
NHA        
NM        
NPA        
NRA 7     7
NSA        
NVM        
NWA        
NWSR        
NSRA        
OCD 843     843
RNA 28     28
WSA 380 1,590   1,970
Areas with multiple designations NM NWSR        
NM OCD        
NM OCD NWSR        
NM RNA        
NRA NWSR        
NRA RNA        
NWSR OCD        
NWSR RNA        
NWSR WSA        
OCD NRA        
OCD RNA 10     10
WSA NSA        
WSA RNA        
Sum 1,268 1,590   2,858
SDA Categories
NPA - National Primitive Area                  NVM - National Volcanic Monument
NSRA - National Scenic Research Area                  NHA - National Historic Area
NSA - National Scenic Area                  WSA - Wilderness Study Area
NWSR - National Wild & Scenic Rivers                  RNA - Research Natural Area
NRA - National Recreation Area                  NWA - National Widerness  Area
NM - National Monument                  OCD - Other Congressionally Designated Areas
NGRWP - National Game Refuge/Wildlife Preserve