What is "entrena"

Entrena is a municipality of La Rioja, ( Spain), located near the capital Logroño. Its population in January 2010 was 1,503 over an area of 21.03 square kilometres. The nucleus is placed at an altitude of 558 metres. It is bordered by Navarrete and Lardero to the north; Albelda de Iregua to the east; Nalda, Sorzano and Sojuela to the south; and Medrano to the west.