Royal Crest Dairy, Inc. Share: Dairy Home Delivery Royal Crest Dairy, Inc. Visit Website 800 Weaver Park Road Longmont, CO 80501 (303) 777-2227 303-702-9114 (fax) www.royalcrestdairy.com About Map About Home Delivery Dairy. What's Nearby? Distance: 5 10 15 20 25 50 mi.