We report for the first time aggregation behavior in the lizard Sceloporus minor. The behavior was recorded at Galeana, Nuevo León, Mexico, where a group of ca. 30 individuals were observed under a rock associated with a stone wall. Weight, sex, snout-vent length, and total length were recorded for 22 individuals. Means of traits were: males—weight  =  18.9 g, snout-vent length  =  80.5 mm, total length  =  173.3 mm; females—weight  =  13.9 g, snout-vent length  =  72.9 mm, total length  =  161.1 mm. Sex ratio was 16 males∶6 females. Our observation extends the known elevational range of the species from ca. 3,000 m to 3,470 m.