Based on the latest available information, the Salmon River Road boat ramp is located in Lemhi County, Idaho, at a latitude of 45.39088058 and a longitude of -114.25644684. This boat ramp provides access to the Salmon River, a major tributary of the Snake River and a popular destination for recreational boating.

The Salmon River Road boat ramp is a concrete ramp that is suitable for launching a wide variety of watercraft, including powerboats, canoes, kayaks, and rafts. The ramp is approximately 20 feet wide, which provides ample space for maneuvering boats in and out of the water.

The Salmon River is known for its scenic beauty and diverse array of wildlife, including salmon, steelhead, and trout. It is a popular destination for fishing, boating, and other outdoor activities, and the Salmon River Road boat ramp is an important access point for visitors to the area.

In terms of regulations, the Idaho Department of Fish and Game manages the Salmon River and sets limits on the size and type of boats that are permitted on the river. Specific regulations may vary depending on the section of the river being accessed, so it is important to check with local authorities or consult the latest fishing and boating regulations before planning a trip to the Salmon River Road boat ramp.