EXHIBIT 21.1

HOLLYFRONTIER CORPORATION

SUBSIDIARIES OF REGISTRANT

State of Incorporation

Name of Entity         or Organization    

Black Eagle, LLC        Delaware

Cheyenne Logistics LLC ⁽⁵⁾    Delaware

El Dorado Logistics LLC ⁽⁵⁾    Delaware

Eagle Consolidation LLC        Delaware

Ethanol Management Company LLC    Delaware

Frontier El Dorado Refining LLC    Delaware    

Frontier Pipeline LLC        Delaware

Frontier Refining LLC        Delaware

Frontier Refining & Marketing LLC    Delaware

HEP Fin-Tex/Trust-River, L.P. ⁽⁵⁾    Texas

HEP Logistics GP, L.L.C ⁽⁵⁾    Delaware

HEP Logistics Holdings, L.P.    Delaware

HEP Mountain Home, L.L.C. ⁽⁵⁾    Delaware

HEP Navajo Southern, L.P. ⁽⁵⁾    Delaware

HEP Pipeline Assets, Limited Partnership ⁽⁵⁾    Delaware

HEP Pipeline GP, L.L.C. ⁽⁵⁾    Delaware

HEP Pipeline, L.L.C. ⁽⁵⁾        Delaware

HEP Refining GP, L.L.C. ⁽⁵⁾    Delaware

HEP Refining Assets, L.P. ⁽⁵⁾    Delaware

HEP Refining, L.L.C. ⁽⁵⁾        Delaware

HEP SLC, LLC ⁽⁵⁾        Delaware

HEP Tulsa LLC ⁽⁵⁾        Delaware

HEP UNEV Holdings LLC ⁽⁵⁾    Delaware

HEP UNEV Pipeline LLC     ⁽⁵⁾    Delaware

HEP Woods Cross, L.L.C. ⁽⁵⁾    Delaware

Holly Biofuels, LLC        Delaware

Holly Energy Finance Corp. ⁽⁵⁾    Delaware

Holly Energy Partners, L.P. ⁽⁴⁾    Delaware

Holly Energy Partners – Operating, L.P. ^{(4), (5)}    Delaware

Holly Energy Storage – Lovington LLC    Delaware

Holly Logistics Limited LLC    Delaware

Holly Logistic Services, L.L.C.    Delaware

Holly Petroleum, Inc.        Delaware

HollyFrontier Payroll Services, Inc.    Delaware

Holly Realty, LLC        Delaware

Holly Refining & Marketing – Tulsa LLC    Delaware

HollyFrontier Aviation LLC    Delaware

HollyFrontier Holdings LLC    Delaware

HollyFrontier Refining & Marketing LLC    Delaware

HollyFrontier Services LLC    Delaware

Holly Refining & Marketing Company – Woods Cross LLC    Delaware

Holly Refining Communications, Inc.    Delaware

Holly Transportation LLC        Delaware

Holly Western Asphalt Company    Delaware

Hollymarks, LLC        Delaware

HRM Realty, LLC        Delaware

Lea Refining Company        Delaware

Lovington-Artesia, L.L.C. ⁽⁵⁾    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

Navajo Refining Company, L.L.C. ⁽²⁾    Delaware

Navajo Western Asphalt Company    New Mexico

NK Asphalt Partners ⁽³⁾        New Mexico

Roadrunner Pipeline, L.L.C. ⁽⁵⁾    Delaware     

UNEV Pipeline, LLC        Delaware

Wainoco Resources, Inc.        Delaware

Wainoco Oil and Gas Company    Delaware    

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

(2) Navajo Refining Company, L.L.C. also does business as Navajo Refining Company.

(3) NK Asphalt Partners does business as Holly Asphalt Company.

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

(5) 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.