In the month of May, the San Isidro festival is also celebrated, but in a somewhat special way. Laguardia dresses up to celebrate this festivity, in honor of the patron saint of farmers, the day the Agricultural Machinery and Products Fair takes place.

The ringing of bells and the firing of rockets, which will mark the eve of San Isidro's day, precede the celebration of a mass in the church of Santa María de los Reyes in honor of the patron saint. The day concludes with the cucañas that will be organized in the Plaza Mayor for the little ones.

The events start very early with the targets and parades through the town center. The music gives way to the traditional procession of San Isidro and to a popular lunch in which all the neighbors can participate. The party ends at night with the dinner of the members of the San Isidro brotherhood.