The Ontario State Park boat ramp is located in the western part of Idaho, near the border with Oregon. It is a concrete boat ramp that provides access to the Snake River, which is one of the major rivers in the western United States. The ramp is approximately 20 feet wide, which is wide enough for most types of watercraft.

According to the most recent information available, the Ontario State Park boat ramp is open to all types of watercraft, including power boats, fishing boats, kayaks, and canoes. However, there are some restrictions on the use of motorized boats on the Snake River, particularly in areas where there are protected species of fish and wildlife.

Overall, the Ontario State Park boat ramp is a popular destination for boating enthusiasts in the region. It provides easy access to the Snake River and offers a range of opportunities for fishing, water sports, and other recreational activities. As with any boating facility, it is important to check local regulations and conditions before launching your boat to ensure a safe and enjoyable experience.