Portland, Iowa — Swamps
Swamps Near Portland, Iowa
Nearest Swamps by Distance
| # | Swamp | Distance |
|---|---|---|
| 1. | Grass Lake | 28.4 mi. |
| 2. | Michaelsen Marsh | 49.4 mi. |
| 3. | Sweet Marsh | 49.8 mi. |
| 4. | Dismal Swamp | 51.2 mi. |
| 5. | Spicer Lake | 52.4 mi. |
| 6. | Shea Lake | 52.8 mi. |
| 7. | Impassable Marsh (historical) | 53.7 mi. |
| 8. | Greenwood Marsh | 60.2 mi. |
| 9. | Rutland Marsh | 62.6 mi. |
| 10. | Senn Marsh | 63.9 mi. |
Swamp Locations