The Sand Island Recreation Site boat ramp in Utah is a concrete boat ramp that provides access to the San Juan River. The ramp is approximately 30 feet wide and can accommodate most types of watercraft, including kayaks, canoes, and motorboats. It is also equipped with a courtesy dock for loading and unloading passengers and gear.

According to the latest information available, the San Juan River is open to a variety of watercraft, including motorized boats up to 35 feet in length. However, boaters are advised to check with local authorities for any restrictions or regulations before launching.

Overall, the Sand Island Recreation Site boat ramp provides a convenient and accessible entry point for boaters looking to explore the scenic San Juan River in Utah.