Based on the latest information available, the Dewberry Avenue East 526 boat ramp in Omak, Washington is a concrete boat ramp. It is approximately 14 feet wide and has a gradual slope into the water. The ramp provides access to the Okanogan River, which is a popular destination for fishing and recreational boating. The river is suitable for small watercraft such as kayaks, canoes, and small fishing boats. However, larger craft, such as powerboats, may have difficulty navigating the shallow waters and rapids in certain sections of the river. It is important to note that water levels and conditions can change rapidly, so it is recommended to check local conditions and regulations before launching any watercraft.