It services the Columbia River, which is a major river in the Pacific Northwest region of North America. The ramp can accommodate various types of watercraft, including powerboats, sailboats, kayaks, canoes, and rafts. However, it is important to note that the specific regulations regarding watercraft may vary depending on the season and the current conditions of the river. It is recommended that visitors check with the Oregon State Parks website for up-to-date information regarding watercraft regulations at Hat Rock State Park.
| UMATILLA RIVER NEAR UMATILLA | 129cfs |
| WALLA WALLA RIVER NEAR TOUCHET | 196cfs |
| UMATILLA R AT W RESERVATION BNDY NR PENDLETON | 84cfs |
| YAKIMA RIVER AT KIONA | 1520cfs |
| MEACHAM CREEK AT GIBBON | 20cfs |
| WILLOW CREEK AT MORGAN STREET | 1cfs |