Marathon
| Dam Name | Marathon |
| River | Haradros |
| Near City | Athena |
| Administration City | Sterea Hellas |
| Country | Greece |
| Year | 1931 |
| Dam Height | 63 |
| Dam Length | 285 |
| Area(Sqkm) | 1.7 |
| Area(Polygonal) | 1.7 |
| Capital Expenditure | 41 |
| Depth(M) | 24.1 |
| Avg Displacement Of Water | 541 |
| Catchment Area In Sqkm | 116 |
| Main Usage | Water supply |
| Status | 2: Good |
| Longitude | 23.904583 |
| Latitude | 38.16625 |
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