Based on available information, the boat ramp named Park County is located in the state of Montana, with a latitude of 45.70873642 and a longitude of -110.34900665. This boat ramp is situated near the Yellowstone River, a popular recreational waterway in the area.

The Park County boat ramp is a concrete ramp, which is approximately 20 feet wide, and can accommodate a variety of watercraft. However, the exact types of craft allowed on the water may vary depending on local regulations and conditions.

According to the Montana Fish, Wildlife & Parks website, the Yellowstone River is open to a wide range of boating activities, including motorized and non-motorized vessels such as canoes, kayaks, rafts, and powerboats. However, it is important to note that certain stretches of the Yellowstone River may have specific restrictions or guidelines for boaters, such as seasonal closures or speed limits.

In general, it is always recommended to check local regulations and guidelines before embarking on any boating or water-related activities. Additionally, boaters should always exercise caution and follow safety protocols to ensure a safe and enjoyable experience on the water.