QuickLinks -- Click here to rapidly navigate through this document

Exhibit 21.1

Subsidiaries of Bonanza Creek Energy, Inc.

Bonanza Creek Energy Operating Company, LLC, a Delaware limited liability company

Bonanza Creek Energy Resources, LLC, a Delaware limited liability company

Bonanza Creek Energy Upstream, LLC, a Delaware limited liability company

Bonanza Creek Energy Midstream, LLC, a Delaware limited liability company

Holmes Eastern Company, LLC, a Delaware limited liability company

El Dorado Creek Pipeline Company, LLC, a California limited liability company

Liberty Energy Company, LLC, a California limited liability company

QuickLinks

Exhibit 21.1

Subsidiaries of Bonanza Creek Energy, Inc.