The Beaver Slough / Clatskanie River system in Oregon is a tidal river network offering sheltered, flatwater paddling with direct access to the Columbia River. The primary access point is the Beaver Boat Ramp and Park in downtown Clatskanie, located at river mile 1 of the Clatskanie River. This full-service launch features paved parking, boarding floats, restrooms, and barbecue grills, with a daily parking fee. From this ramp, it is a 2.5-mile flatwater paddle downstream to the confluence with the Columbia River. The system connects to the Westport Slough to the west, creating a potential sheltered route paralleling over seven miles of the Columbia. Passage between the Clatskanie River and Westport Slough is possible via a specific culvert, but this is highly tide-dependent; one account notes attempting passage at a tide height of +6.7 feet, while another account suggested it may be passable at low tide, potentially requiring a portage. An alternative ADA kayak launch exists at Westport, Oregon, for accessing Westport Slough. The entire area is tidally influenced, and paddlers must plan trips around tide times and heights, which can be significant. For example, a trip plan referenced a low tide of -1.74 feet and a subsequent high of 5.12 feet at a nearby station. Paddling on the Columbia River itself introduces exposure to wind, fetch, and commercial and recreational boat traffic. The sheltered sloughs and river sections are characterized by rural residential, agricultural, and timber land, with banks that can be overgrown. Wildlife includes salmonids such as Coho Salmon and Steelhead.