Yecla’s vineyards are planted on hills that range from about 1,300 to 2,600 feet in height.  The DO’s climate, while considered to be continental, is tempered somewhat by its southeastern location.  The region’s temperatures range from about 23 degrees Fahrenheit in winter to 102 degrees Fahrenheit in the summer months.  Yecla’s soils lie on limestone bedrock.  In most areas, there is a thick layer of subsoil topped by sandy or silty topsoil.  The Yecla DO includes two sub-regions, Campo Arriba and Campo Abajo.  Campo Arriba lies north of the city of Yecla.  This sub-region’s vineyards lie at higher elevations than those of Campo Abajo.  Campo Arriba is best known for its red wines, while more white wine grapes are grown in Campo Abajo.