Addressing and Mapping (GIS)

About Addresses in Dolores County

The county is divided into a block grid (address grid) using approximately one-mile increments.  Addresses are assigned 1000 address numbers per block grid and range numbers are assigned to every grid line.

Dolores County addresses increase from north to south and west to east.  

• The last digit of the address contains an odd or even number representing which direction the driveway is located.  
• Odd numbers are located on the west and north sides and even are located on the east and south sides of the road.  

For our address system to work properly the roads are named according to our address grid. 

Dolores County Roads are comprised of numbered and lettered roads.  

• Numbered roads are north/south roads numbered from the UT/CO State Line from west to east
• Lettered Roads are East/West roads.
  • Starts at San Miguel County Line to Montezuma County Line

Addresses along the state highways are addressed according to the closest mile marker number.  

Hwy 491

• Mile marker numbers on Hwy 491 range from MM 50 near the Dolores/Montezuma County Line to MM 68 near the CO/UT State Line.  
• Considered a north/south highway

Hwy 141

• Mile marker numbers on Hwy 141 range from MM 1 near the Hwy 491/Hwy 141 Intersection to MM 7 near the Dolores/San Miguel County Line. 

Hwy 145

• Mile marker numbers on Hwy 145 range from MM 43 at the Dolores/Montezuma County Line to MM 59 near the Dolores/San Miguel County Line.  

Green signed roads are county roads and red signed roads are private roads assigned a road name that correlates with the Dolores County Road Naming Standards for addressing purposes.  

To obtain an address, please contact the Addressing Office. 

If your property is accessed via county road, a Driveway Permit must be issued.  

If your property is accessed via a private road contact the Addressing Office for further details.