Oreston Slipway is a free, publicly accessible boat ramp located at Oreston on the River Plym, within the Cattewater area of Plymouth (grid reference SX 4999 5356).

The concrete slipway is 12 metres wide and provides access to the water during most states of the tide, though at low water spring tides users must cross the estuary bed to reach the water.

The slipway accommodates boats launched from trailers and is suitable for dinghies, canoes, and small craft. When launching, it is advisable to keep to the main estuary channel until reaching Plymouth Sound, approximately 1.

5 km downstream, as the Cattewater dries out near the shore at low water. Vessels must travel at 8 knots or less and avoid making a wake until beyond Mount Batten Breakwater.

A free car park for up to 20 vehicles sits alongside the slipway, and the council maintains a secure small boat parking area nearby. Cars should not be left parked at the top of the slip.