EXHIBIT 21.1

HOLLYFRONTIER CORPORATION

SUBSIDIARIES OF REGISTRANT

State of Incorporation

Name of Entity         or Organization    

Black Eagle, LLC        Delaware

Cheyenne Logistics LLC ⁽³⁾    Delaware

El Dorado Logistics LLC ⁽³⁾    Delaware

El Dorado Operating LLC    ⁽³⁾    Delaware

El Dorado Osage LLC ⁽³⁾        Delaware

El Paso Operating LLC        Delaware

Eagle Consolidation LLC        Delaware

Ethanol Management Company LLC    Delaware

Frontier Pipeline LLC        Delaware

Frontier Refining & Marketing LLC    Delaware

HEP Casper SLC LLC ⁽³⁾        Delaware

HEP El Dorado LLC ⁽³⁾        Delaware

HEP Fin-Tex/Trust-River, L.P. ⁽³⁾    Texas

HEP Logistics GP, L.L.C ⁽³⁾    Delaware

HEP Logistics Holdings, L.P.    Delaware

HEP Mountain Home, L.L.C. ⁽³⁾    Delaware

HEP Navajo Southern, L.P. ⁽³⁾    Delaware

HEP Pipeline Assets, Limited Partnership ⁽³⁾    Delaware

HEP Pipeline GP, L.L.C. ⁽³⁾    Delaware

HEP Pipeline, L.L.C. ⁽³⁾        Delaware

HEP Refining Assets, L.P. ⁽³⁾    Delaware

HEP Refining GP, L.L.C. ⁽³⁾    Delaware

HEP Refining, L.L.C. ⁽³⁾        Delaware

HEP SLC, LLC ⁽³⁾        Delaware

HEP Tulsa LLC ⁽³⁾        Delaware

HEP UNEV Holdings LLC ⁽³⁾    Delaware

HEP UNEV Pipeline LLC     ⁽³⁾    Delaware

HEP Woods Cross, L.L.C. ⁽³⁾    Delaware

Holly Biofuels, LLC        Delaware

Holly Energy Finance Corp. ⁽³⁾    Delaware

Holly Energy Partners, L.P. ⁽²⁾    Delaware

Holly Energy Partners – Operating, L.P. ^{(2), (3)}    Delaware

Holly Energy Storage – Lovington LLC    Delaware

Holly Logistics Limited LLC    Delaware

Holly Logistic Services, L.L.C.    Delaware

Holly Petroleum, Inc.        Delaware

Holly Realty, LLC        Delaware

Holly Refining Communications, Inc.    Delaware

HollyFrontier Asphalt Company LLC    Delaware

HollyFrontier Cheyenne Refining LLC    Delaware

HollyFrontier El Dorado Refining LLC    Delaware

HollyFrontier Holdings LLC    Delaware

HollyFrontier Navajo Refining LLC    Delaware

HollyFrontier Payroll Services, Inc.    Delaware

HollyFrontier Refining & Marketing LLC    Delaware

HollyFrontier Services LLC    Delaware

HollyFrontier Tulsa Refining LLC    Delaware

HollyFrontier Transportation LLC    Delaware

HollyFrontier Woods Cross Refining LLC    Delaware

Hollymarks, LLC        Delaware

HRM Realty, LLC        Delaware

Lea Refining Company        Delaware

Lovington-Artesia, L.L.C. ⁽³⁾    Delaware

Navajo Holdings, Inc.        New Mexico

Navajo Pipeline Co., L.P. ⁽¹⁾    Delaware

Navajo Pipeline GP, L.L.C.    Delaware

Navajo Pipeline LP, L.L.C.    Delaware

Osage Pipe Line Company, LLC ⁽³⁾    Delaware

Roadrunner Pipeline, L.L.C. ⁽³⁾    Delaware     

UNEV Pipeline, LLC ⁽³⁾        Delaware

Wainoco Oil and Gas Company    Delaware

Wainoco Resources, Inc.        Delaware

Whispering Eagle Holdings LLC    Delaware

Whispering Eagle LLC        Delaware

(1) Navajo Pipeline Co., L.P. also does business as Navajo Pipeline Co.

(2) Holly Energy Partners, L.P. and Holly Energy Partners – Operating, L.P. also do business as Holly Energy Partners.

(3) Represents a subsidiary of Holly Energy Partners, L.P. We have presented these entities in our list of subsidiaries as a result of our reconsolidation of Holly Energy Partners, L.P. on March 1, 2008.