According to the latest information available, Cottonmill boat ramp is located at latitude 40.705513 and longitude -99.1473999 in Nebraska. It is a concrete boat ramp that is relatively wide, allowing for easy launch and retrieval of boats of varying sizes. The ramp provides access to the Cottonwood Lake, a popular boating and fishing spot in the area.

The Cottonmill boat ramp is designed to accommodate a wide range of watercraft, including fishing boats, pontoons, kayaks, and canoes. However, larger boats may have difficulty navigating the narrow channels and shallow waters in certain areas of the lake.

Overall, Cottonmill boat ramp is a well-maintained and popular launch point for boaters and anglers in Nebraska. It provides easy access to the beautiful Cottonwood Lake and offers ample parking and facilities for visitors.