what county is ft. sumner nm in
FORT SUMNER, DE BACA COUNTY, NEW MEXICO LAND FOR SALE: 1 - 15 of 16 listings. 1. PECOS RIVER BOSQUE RANCHTHE PROPERTY: The Pecos River Ranch is located 5 miles south of Fort Sumner, NM on Highway 20. The ranch can be purchased as a whole or could be split into two smaller ranches.