After conducting research on Smith River Falls boat ramp in Oregon, it appears that information about this specific ramp is limited and not readily available online. However, based on the coordinates provided (latitude: 43.79044722700007, longitude: -123.81266637899995), it is likely that the ramp services the Smith River, which runs through Douglas County in southwestern Oregon.

Without further information, it is difficult to determine the width of the ramp or the types of watercraft permitted on the river. It is important to note that regulations and restrictions regarding boating and fishing on Oregon waterways are subject to change and may vary depending on the location and time of year. It is recommended that individuals interested in using Smith River Falls boat ramp or accessing the Smith River contact local authorities or visit the Oregon Department of Fish and Wildlife website for up-to-date information.