The boat ramp named Shafer Trail Grand County is located at latitude 38.50576019 and longitude -109.65908051 in Utah. It is a concrete boat ramp that provides access to the Colorado River. The ramp is approximately 30 feet wide and can accommodate small to medium-sized watercraft.

According to the latest information available, the Colorado River is open to motorized and non-motorized watercraft such as canoes, kayaks, rafts, and powerboats. However, certain areas of the river may have restrictions based on water flow, water levels, and other factors.

It should be noted that the use of the boat ramp may require a permit or fee, depending on the specific regulations set forth by the managing agency. Boaters are advised to check with the local authorities or park service for any applicable rules and regulations before using the boat ramp.