Colorado 4WD Roads by Region
I have divided Colorado into six sections following the main highways. This ensures that a 4WD road is not split into two regions as would be the case if you used Land Managing Agencies boundaries, County boundaries, or Mountain Ranges. The six regions list the roads in alphabetical order.

Colorado State Map
 Northwest - Northwest corner of Colorado from I-70 north to Wyoming, and from Utah east to Kremmling/Walden.
 Northeast - Northeast corner of Colorado from I-70 north to Wyoming, and from Kremmling/Walden east to Kansas.
 West Central - Central Colorado from I-70 south to Hwy 50, and Grand Junction east to Leadville/Buena Vista.
 East Central - Central Colorado from I-70 south to Hwy 50, and Leadville/Buena Vista east to Kansas.
 Southwest - Southwest corner of Colorado from Hwy 50 south to New Mexico, and Utah east to Hwy 285.
 Southeast - Southeast corner of Colorado from Hwy 50 south to New Mexico, and Hwy 285 east to Kansas.

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