Home › Colorado › Littleton, CO › Holt Orthodontics Holt Orthodontics Orthodontic practice in Littleton, CO Locations in Highlands Ranch and Littleton. Listing details last checked September 22, 2026. Contact Practice phone (303) 798-0928 Website holtorthodontics.com Call (303) 798-0928 Visit website Locations Location 1 7889 South Lincoln Court, Suite #102 Littleton, CO 80122 (303) 798-0928 Location 2 4185 East Wildcat Reserve Parkway, Suite #100 Highlands Ranch, CO 80126 (303) 798-0928 Providers Dr. Gary M. Holt More Littleton orthodontic practices Comfort Dental Braces Southwest Galen T. Callender Orthodontics Highlands Ranch Orthodontics View all Littleton listings