The article is based on materials on age-related changes in the color of the lower surface of the tail and back of the thighs in the population of the Rapid racerunner (Eremias velox velox Pallas, 1771), living on the Sarykum sandy massif. The material was collected in the first ten days of May 2023. A total of 110 individuals were caught and described: 44 males, 36 females and 30 immature individuals. The size characteristics of sex and age groups are given.