After conducting research, it appears that the East Bank Boat Ramp is located in the Beaverhead-Deerlodge National Forest in Montana. This boat ramp is situated on the eastern bank of Clark Canyon Reservoir, a popular destination for fishing and boating.

The East Bank Boat Ramp is described as a concrete boat ramp that is approximately 40 feet wide, making it suitable for launching and retrieving boats of varying sizes. The latest information available suggests that the boat ramp is well-maintained and provides easy access to the water.

Clark Canyon Reservoir is a 4,900-acre lake that offers opportunities for fishing, boating, and other water recreation activities. The reservoir is known for its populations of rainbow trout, brown trout, and kokanee salmon, among other fish species. The East Bank Boat Ramp services this body of water, allowing visitors to launch their watercraft and explore all that the lake has to offer.

As for the types of watercraft permitted on the reservoir, it appears that motorized boats, canoes, kayaks, and other non-motorized craft are allowed. However, it is important to note that there may be certain restrictions or regulations in place depending on the time of year and other factors. It is always a good idea to check with local authorities or consult local resources before heading out on the water.