What "area"? What's "LR"?
Some long distance ranges that come to mind are listed below. Note that some have a daily fee, some are private and require memberships (or be a guest) to access, others sponsor matches and/or open range days that are open to the public.
Bridgeville Club, Bridgeville, DE - 1,000 yards.
Quantico Shooting Club, Quantico MCB, VA - 1,000 yards
Peacemaker International, Gerrardstown, WV (near Winchester, VA) - 1,000 yards
Reade Range, Fallen Timber, PA (near Altoona) - 1,000 yards
PA 1,000 Yard BR Club, Williamsport, PA
New Holland Rifle & Pistol Club, New Holland, PA - 700 yards
Mayberry Fish & Game Conservation Club, Mayberry, MD (near Westminster) - 600 yards
You know about Delmarva Sporting Clays in Marydel, MD - 500 yards
Hap Baker Range, Westminster, MD -200 yards