| distance | reference number | name | latitude | longitude |
| 305.0 | 916 | Ellsworth, Washington | 45.6 | -122.55 |
| 311.0 | 2431 | Portland, Willamette River, Oregon | 45.5167 | -122.667 |
| 311.3 | 2430 | Portland, Morrison Street Bridge, Oregon | 45.51 | -122.673 |
| 312.1 | 3205 | Vancouver, Washington | 45.6167 | -122.667 |
| 314.0 | 3204 | Vancouver, Columbia River, Washington | 45.6317 | -122.697 |
| 317.6 | 2920 | St. Johns, Willamette River, Oregon | 45.5833 | -122.767 |
| 318.3 | 1540 | Knapp Landing, Washington | 45.7333 | -122.75 |
| 318.4 | 1484 | Kelley Point, Oregon | 45.65 | -122.767 |
| 319.7 | 121 | Ayock Point, Washington | 47.5083 | -122.053 |
| 322.8 | 2624 | Saint Helens, Columbia River, Oregon | 45.865 | -122.797 |
| 323.0 | 2625 | Saint Helens, Oregon | 45.8667 | -122.8 |
| 324.8 | 2576 | Rocky Point, Multnomah Channel, Oregon | 45.6967 | -122.868 |
| 327.8 | 1458 | Kalama, Washington | 46 | -122.85 |
| 330.5 | 768 | Des Moines, East Passage, Washington | 47.4 | -122.328 |
| 331.0 | 2805 | Sitcum Waterway, Tacoma, Washington | 47.2667 | -122.413 |
| 331.0 | 3019 | Tacoma, Commencement Bay, Washington | 47.2667 | -122.413 |
| 334.3 | 838 | Duwamish Waterway, Eighth Ave. South, Seattle, Wash | 47.535 | -122.322 |
| 335.1 | 1690 | Longview, Washington | 46.1 | -122.95 |
| 335.7 | 1689 | Longview, Columbia River, Washington | 46.1083 | -122.957 |
| 337.3 | 2725 | Seattle, Puget Sound, Washington | 47.605 | -122.338 |
| 337.4 | 387 | Burton, Quartermaster Harbor (inside), Vashon Islan | 47.395 | -122.463 |
| 337.9 | 3023 | Tahlequah, Neil Point, Washington | 47.3317 | -122.507 |
| 337.9 | 1664 | Lockheed Shipyard, Harbor Island, Seattle, Washingt | 47.585 | -122.362 |
| 338.6 | 3018 | Tacoma Narrows Bridge, Washington | 47.2717 | -122.552 |
| 338.6 | 2958 | Steilacoom, Washington | 47.1733 | -122.603 |