Place
- Pajaro River Valley (Calif.)1
- Passamaquoddy Bay (N.B. and Me.)1
- Pawtuxet River (R.I.)1
- Pettaquamscutt River (R.I.)1
- Piscataqua River (N.H. and Me.)1
- Plymoth (Mass.)1
- Plymouth Bay (Mass.)1
- Point Lobos State Reserve (Calif.)1
- Rocky Mountains1
- Sakonnet River (R.I.)1
- San Francisco (Calif.)1
- San Francisco Bay Area1
- Searsville Lake (Calif.)1
- Stellwagen Bank National Marine Sanctuary (Mass.)1
- Taunton River (Mass.)1
- Tehama County (Calif.)1
- Ten Mile River (Mass.)1
- Tomales Bay (Calif.)1
- Uganda1
- United States--Territories and possessions1