- Badlands NP@ (4)
- Bandelier NM@ (3)
- Benjamin Franklin NM@ (0)
- Bent's Old Fort NHS@ (2)
- Bering Land Bridge NPRES@ (2)
- Big Bend National Park@ (6)
- Big Hole NB@ (1)
- Big South Fork National Recreation Area@ (7)
- Big Thicket National Preserve@ (2)
- Bighorn Canyon NRA@ (1)
- Biscayne NP@ (2)
- Blackstone River Valley National Heritage Corridor@ (3)
- Blue Ridge Parkway@ (7)
- Booker T. Washington NM@ (1)
- Boston African American National Historic Site@ (1)
- Boston Harbor Islands National Recreation Area@ (2)
- Boston National Historic Park@ (2)
- Brown vs. Board of Education NHS@ (1)
- Bryce Canyon National Park@ (11)
- Buffalo NSR@ (1)
- Clara Barton NHS@ (1)
- Martin Van Buren NHS@ (3)
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