1 EXHIBIT 21.1 SUBSIDIARIES OF GIANT INDUSTRIES, INC. (A DELAWARE CORPORATION) JURISDICTION OF NAMES UNDER WHICH SUBSIDIARY INCORPORATION COMPANY DOES BUSINESS Giant Industries Arizona, Arizona Giant Refining Company Inc. Ciniza Pipe Line Company Ciniza Production Company* New Mexico Giant Stop-N-Go of New New Mexico Mexico, Inc.* San Juan Refining Company* New Mexico Giant Four Corners, Inc.* Arizona Giant Mid-Continent, Inc.* Arizona Giant Exploration & Texas Production Company Phoenix Fuel Co., Inc.* Arizona * wholly-owned subsidiary of Giant Industries Arizona, Inc.