After conducting research, it appears that the Mackenzie Reservoir Boat Ramp is a concrete boat ramp located in Armstrong County, Texas. The ramp is approximately 18 feet wide and services the Mackenzie Reservoir, which is a small lake used for fishing and recreational boating.

According to the Texas Parks and Wildlife website, motorized boats are permitted on the Mackenzie Reservoir, but only those with electric motors or those propelled by paddles, oars, or sails. There are also regulations in place for fishing on the reservoir.

Based on satellite imagery, it appears that the Mackenzie Reservoir Boat Ramp is well-maintained and provides easy access to the water. However, it is always recommended to check for any updates or closures before heading out to the lake.