Six-lined Racerunner
Cnemidophorus sexlineatus

Family Teiidae

2½" to 3 1/8" snout-vent length; to 10½" overall. Color brown to black, often lighter to center of back, with 6 or 7 narrow light stripes down back and sides. Head and anterior half of body often greenish to brilliant green. No light spots in dark areas between stripes. Head long and triangular. Scales on back small and granular; scales on underside larger and rectangular.
Elevation Range:
Below 6500' in northeastern Colorado; below 7500' in southeast.
Subspecies in Colorado:
Cnemidophorus sexlineatus viridis
  Six-lined Racerunner
Photo from Hammerson, 1986.
Used with permission.
CountyRef. CountyRef. CountyRef. CountyRef.
AdamsH Dolores  La Plata  Pitkin 
Alamosa  DouglasH Lake  ProwersH
ArapahoeH Eagle  LarimerH PuebloH
Archuleta  El PasoH Las AnimasH Rio Blanco 
BacaH ElbertH LincolnH Rio Grande 
BentH FremontH LoganH Routt 
BoulderH Garfield  Mesa  Saguache 
Chaffee  Gilpin  Mineral  San Juan 
CheyenneH Grand  Moffat  San Miguel 
Clear Creek  Gunnison  Montezuma  SedgwickH
Conejos  Hinsdale  Montrose  Summit 
Costilla  HuerfanoH MorganH Teller * 
CrowleyH Jackson  OteroH WashingtonH
Custer *  JeffersonH Ouray  WeldH
Delta  KiowaH Park  YumaH
DenverH Kit CarsonH PhillipsH
Map of Colorado
Color Key
Adams Alamosa Arahapoe Archuleta Baca Bent Boulder Chaffee Cheyenne Clear Creek Conejos Costilla Crowley Custer Delta Denver Dolores Douglas Eagle El Paso Elbert Fremont Garfield Gilpin Grand Gunnison Hinsdale Huerfano Jackson Jefferson Kiowa Kit Carson La Plata Lake Larimer Las Animas Lincoln Logan Mesa Mineral Moffat Montezuma Montrose Morgan Otero Ouray Park Phillips Pitkin Prowers Pueblo Rio Blanco Rio Grande Routt Saguache San Juan San Miguel Sedgewick Summit Teller Washington Weld Yuma