Based on the latest information available, Carters Old Boat Launch is a concrete boat ramp located on the eastern shore of Brownlee Reservoir in Idaho. The ramp is approximately 20 feet wide and provides access to the reservoir for a variety of watercraft, including motorized boats and non-motorized watercraft such as kayaks and canoes.

Brownlee Reservoir is part of the Snake River and spans the border between Idaho and Oregon. The reservoir covers approximately 15,000 acres and provides recreational opportunities such as fishing, boating, and swimming.

According to the Idaho Department of Fish and Game, the reservoir is home to a variety of fish species including smallmouth bass, crappie, catfish, and rainbow trout. Anglers are required to have a valid Idaho fishing license and follow all fishing regulations.

In terms of accessibility, Carters Old Boat Launch is located off of Carters Landing Road and is open year-round, weather permitting. It provides ample parking for vehicles and trailers and is maintained by the Idaho Power Company.

Overall, Carters Old Boat Launch is a well-maintained concrete boat ramp that provides access to Brownlee Reservoir for a variety of watercraft. It is a popular destination for fishing and boating enthusiasts in the region.