The Green Valley Road 661 Boat Ramp is located in El Dorado Hills, California, at latitude 38.71959305 and longitude -121.10115814. This boat ramp provides access to Folsom Lake, a popular recreational destination for boating, fishing, and swimming.

According to the latest information available, the Green Valley Road 661 Boat Ramp is a concrete ramp that is approximately 12 feet wide. It is suitable for launching small to medium-sized watercraft, including powerboats, sailboats, and personal watercraft. However, it should be noted that access to the boat ramp may be limited during periods of low water levels on Folsom Lake.

In terms of regulations, all boats must comply with California state laws and regulations regarding safety equipment, registration, and licensing. Additionally, there are restrictions on the use of certain types of watercraft, such as jet skis, within certain areas of Folsom Lake, so it is important to check local regulations before launching from the Green Valley Road 661 Boat Ramp.

Overall, the Green Valley Road 661 Boat Ramp provides convenient access to the scenic and popular Folsom Lake, and is suitable for a wide variety of recreational watercraft.