Based on the latest information available, the South Entrance Road boat ramp in Teton County, Wyoming is a concrete boat ramp with a relatively wide width that can accommodate various watercraft. It services the Jackson Lake, which is a large natural lake located in Grand Teton National Park.

According to the National Park Service, the South Entrance Road boat ramp is approximately 25 feet wide and features a gradual slope that allows for easy access for boats of various sizes. The ramp is suitable for smaller craft such as kayaks and canoes, as well as larger recreational boats, including fishing boats and jet skis. However, it should be noted that motorized boats are only permitted on Jackson Lake with a valid permit and appropriate safety equipment.

In addition to the boat ramp, the South Entrance Road area offers a variety of amenities and services for boaters and visitors alike. These include picnic areas, restrooms, and parking facilities. Visitors can also rent boats and other equipment from nearby concessionaires.

Overall, the South Entrance Road boat ramp in Teton County, Wyoming is a well-maintained and versatile facility that provides easy access to one of the region's most popular recreational waterways.