| distance | reference number | name | latitude | longitude |
| 478.5 | 1579 | Lake Charles, Calcasieu River, Louisiana | 30.225 | -93.2217 |
| 480.3 | 2129 | Orange (Old Navy Base), Texas | 30.0983 | -93.7217 |
| 485.9 | 2500 | Rainbow Bridge, Neches River, Texas | 29.98 | -93.8817 |
| 492.2 | 2609 | Sabine Naches Canal, Port Arthur, Texas | 29.8667 | -93.93 |
| 494.1 | 1718 | Lynchburg Landing, San Jacinto River, Texas | 29.765 | -95.0783 |
| 494.6 | 2648 | San Jacinto Battleground State Historic Site, Texas | 29.7567 | -95.09 |
| 496.1 | 2297 | Point Barrow, Trinity Bay, Galveston Bay, Texas | 29.7333 | -94.8333 |
| 496.3 | 2595 | Round Point, Trinity Bay, Texas | 29.7333 | -94.7 |
| 497.1 | 1328 | Houston Ship Channel, Galveston Bay, Manchester, Te | 29.7183 | -95.2517 |
| 497.1 | 1329 | Houston Ship Channel, Manchester, Texas | 29.7183 | -95.2517 |
| 497.5 | 2594 | Round Point, Trinity Bay, Galveston Bay, Texas | 29.7133 | -94.69 |
| 498.4 | 1813 | Mesquite Point, Texas | 29.7667 | -93.9 |
| 498.4 | 1812 | Mesquite Point, Sabine Pass, Texas | 29.7667 | -93.895 |
| 499.1 | 153 | Barbours Cut, Morgans Point, Galveston Bay, Texas | 29.6817 | -94.985 |
| 499.1 | 154 | Barbours Cut, Morgans Point, Texas | 29.6817 | -94.985 |
| 500.8 | 2611 | Sabine Pass (north), Texas | 29.73 | -93.87 |
| 500.8 | 2612 | Sabine Pass, Texas | 29.73 | -93.87 |
| 502.8 | 399 | Calcasieu Pass, Lighthouse wharf, Louisiana | 29.7833 | -93.35 |
| 504.0 | 398 | Calcasieu Pass, East Jetty, Louisiana | 29.765 | -93.3433 |
| 505.9 | 2610 | Sabine Pass (jetty), Texas | 29.65 | -93.8333 |
| 506.2 | 583 | Clear Lake, Galveston Bay, Texas | 29.5633 | -95.0667 |
| 506.2 | 584 | Clear Lake, Texas | 29.5633 | -95.0667 |
| 508.0 | 1810 | Mermentau River entrance, Louisiana | 29.75 | -93.1 |
| 509.9 | 2579 | Rollover Pass, Texas | 29.515 | -94.5133 |
| 509.9 | 1103 | Gilchrist, East Bay, Texas | 29.5167 | -94.4833 |