M Hill is such a great park located right in Rapid City South Dakota. Hanson- Larsen Memorial Park (HLMP) is know to the locals as M Hill or. Ralyn M. Hill (May 6, – March 25, ) was a soldier in the United States Army who received the Medal of Honor for his actions during World War I. Home · About HLMP · Eddie Rocks! Our Story · The Park · How to Find Us! Trail Etiquette · Trail Map · Life on the Hill · Photos · Events · Friends & Supporters. Hill Company Status Defunct Founded Founder George M. Frank Baum and W. This biographical article related to World War I United States Army is a stub. Defunct publishing companies of the United States Publishing companies established in establishments in Illinois. It was founded in by George M.