Based on the latest information available, the boat ramp named Henry's Lake - Boat Access is a concrete boat ramp located in Henry's Lake State Park in Idaho. The ramp is approximately 30 feet wide and is designed for motorized boats, canoes, and kayaks.

The boat ramp provides access to Henry's Lake, which is a popular destination for fishing and other water activities. The lake is approximately 8 miles long and 2 miles wide, with a surface area of around 6,000 acres.

The Idaho Department of Fish and Game manages the lake, and fishing is permitted year-round. The lake is known for its trout fishing, including rainbow, cutthroat, and brook trout. Other watercraft permitted on the lake include sailboats, paddleboards, and float tubes.

Overall, Henry's Lake - Boat Access provides a convenient and well-maintained launch site for a variety of watercraft, making it a popular destination for outdoor enthusiasts in the area.