US 89 Park County boat ramp in Montana is a concrete boat ramp that is approximately 16 feet wide. It services the Yellowstone River, which is a popular destination for both recreational fishing and boating. According to the Montana Fish, Wildlife & Parks website, motorized watercraft are allowed on the Yellowstone River, including jet boats, powerboats, and pontoons. However, the website notes that it is important for boaters to be aware of the river's changing water levels and potential hazards, such as rocks and rapids. It is recommended that boaters check with local authorities for current river conditions and regulations before launching at this boat ramp.