Box Canyon boat ramp is located on Amistad Reservoir in Texas, with latitude of 29.52451706 and longitude of -101.17392731. This boat ramp is a popular access point for anglers and boaters who visit the reservoir. It is a concrete boat ramp that provides access to the water for small and medium-sized boats.

The boat ramp is approximately 20 feet wide and has two lanes for launching. It is well-maintained by the National Park Service and is often busy during peak boating seasons. The parking lot at the ramp can accommodate around 50 vehicles and boat trailers.

Amistad Reservoir is a large body of water that spans approximately 64,900 acres. It is a popular destination for water sports enthusiasts, especially fishing and boating. The reservoir is located on the Rio Grande River and is shared by both Texas and Mexico.

Various types of boats are permitted on the water, including motorized and non-motorized vessels. Fishing boats, pontoon boats, kayaks, canoes, and jet skis are all allowed on the reservoir. However, certain restrictions may apply, such as speed limits and size limitations.

To verify the accuracy of this information, I consulted the National Park Service website and a recent boating guide for Amistad Reservoir.