EXHIBIT 21.1

SUBSIDIARIES

OF

SM ENERGY COMPANY

A.    Wholly-owned subsidiaries of SM Energy Company, a Delaware corporation:

1.    SMT Texas LLC, a Colorado limited liability company

2.    Belring GP LLC, a Delaware limited liability company

3.    St. Mary Energy Louisiana LLC, a Delaware limited liability company

4.    Hilltop Investments, a Colorado general partnership

5.    Parish Ventures, a Colorado general partnership

6.    Green Canyon Offshore LLC, a Delaware limited liability company

B.    Partnership interests held by SMT Texas, LLC:

1.    St. Mary Land East Texas LP, a Texas limited partnership (99%) (the remaining 1% interest is held by SM Energy Company)