Topography The area historically known as the Mimbres Valley begins at the
headwaters of the Mimbres River between Reeds Peak and
McKnight Mountain, in the
Black Range, near the
Continental Divide in Grant County. This northern part of the valley which is not included in the boundaries of the viticultural area is a narrow channel for the Mimbres River bordered by foothills and mountains. The northern portion of the Mimbres Valley viticultural area is in Grant County near Bear Canyon Dam, where the valley begins to widen and show distinct evidence of a
flood plain area. As the river enters Luna County, the valley widens into a broad, gently sloping flood plain. The course of the river winds around scattered foothill areas until it sinks from sight northeast of Deming, New Mexico, At one time, the primary river course was west of Deming and proceeded south through the
pass separating the Florida Mountains and the Tres Hermanas Mountains. Over the years, the river sank at an area east of Columbus, New Mexico. Today, the Mimbres River is an intermittent stream and is usually dry except during periods of rainfall. The Mimbres River has no definite channel in the southern part of Luna County. At times, water from rainfall drainage has reached as far south as the Mexican border. The viticulture extends south to the U.S.-Mexican border. The Florida, Tres Hermanas Mountains and other non-agricultural land areas were excluded from the boundaries of the viticultural area because the soils, terrain and no available water rights make these mountain areas off limits to grape-growing or any other commercial potential. Elevations in these excluded areas that contain much rock
out-croppings reach as high as . Elevations within the viticultural area generally range from approximately above sea level.
Climate Mimbres Valley viticultural area is characterized by an arid continental climate with minimal precipitation totals, low humidity, plentiful sunshine and large diurnal and seasonal temperature changes. Average annual precipitation totals are between , with half of the rainfall occurring by heavy thunderstorms from the months of July to September. Average annual snowfalls range from . These snowfalls usually melt soon after they occur. According to State Climatologist Kenneth E. Kunkel, there are three locations in the viticultural area where reasonably long weather records have been studied. They are at the towns of Deming, Columbus and
Faywood. Outside of the viticultural area at
Fort Bayard,
Lordsburg and
Las Cruces weather data has also been gathered for some time. Within the area, the elevations vary from about above sea level at the southern end to near at the northern end. These elevation differences are the major cause of some climatic differences within the Mimbres Valley viticultural area. Temperatures are found to be somewhat cooler at the northern end of the viticultural area than at the southern end. The means annual maximum temperature is about 4 degrees lower at Faywood than at Columbus. The growing season varies from 180 days at Faywood to 207 days at Columbus. The number of growing degree days varies from 3,826 at Faywood to 5,049 at Columbus.
Soils The geographical features within the boundaries of this viticultural area are level to gently sloping alluvial soils. The soil associations within the boundaries of the viticultural.area are based upon
U.S.D.A. Soil Conservation Service and Water Resources Research Institute information. Soils found within the boundaries of the viticultural area include Mimbres-Verhalen, Mohave Stellar, Hondale-Mimbres-Bluepoint, Mimbres and Mimbres-Verhalen associations. These soils were formed on flood plains and stream
terraces. They range from sandy to loamy alluvium, and are generally fine, mixed and deep in character. These soils are usually level to gently sloping in terrain. ==Viticulture==