Diamond M Ranch, LLC is a veterinarian-supervised facility located on Mark Twain Lake in northeast Missouri. The property offers stalls in a 16-stall barn along with 50-foot round pens and both small indoor and large outdoor arenas, providing excellent access to the Joanna Trail system.

Overnight boarding includes stalls in a 16-stall barn with access to 50-foot round pens and both small indoor and large outdoor arenas. The facility provides trail access from the property and nearby staging areas.