Valley Nissan of Longmont Share: Automobile Dealers Valley Nissan of Longmont Visit Website 1005 Ken Pratt Blvd. Longmont, CO 80501 303-586-2862 720-494-9585 (fax) www.valleynissan.com About Map About New and pre-owned Nissan. What's Nearby? Distance: 5 10 15 20 25 50 mi.