- 2" to 2½" snout-vent length; to 5 1/8" overall. Color brownish to gray, with rows of mottled pattern between lighter stripes or rows of dots (lighter stripes may be missing in individuals from southwestern Colorado). Two black bars on each side of ventral surface behind forelimbs. No external ear openings.
- Up to 5300' in northeastern Colorado; to 6000' in southern Colorado.
Subspecies in Colorado:
- Holbrookia maculata approximans in southwestern Colorado;
Holbrookia maculata maculata in eastern Colorado.