The Arkansas Hills are a mountain range in Central Colorado located between the upper Arkansas River Valley and the upper South Platte River Valley. This landmass is a continuation of the ridge known as the Mosquito Range north of Trout Creek Pass. The range continues for roughly 60 miles south-southwest from Trout Creek Pass to the town of Texas Creek. Few perennial streams flow out of the Arkansas Hills, as the area is arid. The range is in the rain shadow of the much higher Sawatch and Sangre de Cristo Ranges to the west across the Arkansas River Valley. The City of Salida, Colorado is the most notable municipality near the Arkansas Hills. To the south is the town of Cotopaxi, Colorado. To the east is the town of Guffey, Colorado. The highest points in the Arkansas Hills tend to be between 11,000 and 12,000 feet elevation.
The practice of naming mid-elevation upland areas in central and southern Colorado using the word hills was also illustrated by the naming of the similar uplands between the southern terminus of the Sawatch Range and the northern terminus of the La Garita Range: the Cochetopa Hills.