| Special Designated areas plus adjacent wilderness summary | |||||||||
| Geographic Division | NFS Land in Special Desig. | Adjacent Roads Prohibited IRA (1b+1b1) | Total Roads Prohibited IRA | Percent Adjacent to Special Desig. | Adjacent Roads Prohibited plus Roads Allowed IRA (1b+1b1+1c) | Total Roads Prohibited plus Roads Allowed IRA | Percent Adjacent to Special Desig. | ||
| (acres 1,000) | (acres 1,000) | (acres 1,000) | (%) | (acres 1,000) | (acres 1,000) | (%) | |||
| Alaska | 8,397,000 | 5,281,000 | 9,050,000 | 58 | 7,319,000 | 13,393,000 | 55 | ||
| Eastern U.S. | 2,571,000 | 185,000 | 623,000 | 30 | 624,000 | 1,609,000 | 39 | ||
| Western U.S. | 33,187,000 | 6,885,000 | 13,192,000 | 52 | 20,230,000 | 41,721,000 | 48 | ||
| Totals | 44,154,000 | 12,351,000 | 22,865,000 | 54 | 28,173,000 | 56,723,000 | 50 | ||