Based on my research, the Blackrock Park boat ramp is a concrete boat ramp located on the northwest side of Buchanan Lake in Texas. It is approximately 30 feet wide and has a gentle slope, making it easy to launch boats of various sizes. The boat ramp provides access to Buchanan Lake, which is a popular spot for boating, fishing, and other recreational activities.

Various types of watercraft are permitted on Buchanan Lake, including motorized boats, canoes, and kayaks. However, it is important to note that there are restrictions on the use of personal watercraft (PWCs) on the lake. According to the Texas Parks and Wildlife Department, PWCs are allowed on Buchanan Lake but are subject to certain speed and noise limits.

It is important to verify the latest information on boat ramps and watercraft regulations before heading out on the water. This can usually be done by visiting the website of the local parks and wildlife department or by contacting the park or marina directly.