EXHIBIT 21.1


SUBSIDIARIES
OF
ST. MARY LAND & EXPLORATION COMPANY
 
A.     Wholly-owned subsidiaries of St. Mary Land & Exploration Company, a Delaware corporation:
 
1.   Nance Petroleum Corporation, a Montana corporation
2.  
St. Mary Energy Company, a Delaware corporation
3.  
Four Winds Marketing LLC, a Colorado limited liability company
4.  
SMT Texas LLC, a Colorado limited liability company

B.     Other subsidiaries of St. Mary Land & Exploration Company:

1.  
Box Church Gas Gathering LLC, a Colorado limited liability company (58.6754%)
2.  
Trinity River Services LLC, a Texas limited liability company (25%)
 
C.     Wholly-owned subsidiaries of St. Mary Energy Company:

1.  
SMEC Texas LLC, a Colorado limited liability company
 
D.     Partnership interests held by St. Mary Land & Exploration Company:

1.  
Hilltop Investments, a Colorado general partnership (50%)
2.  
Parish Ventures, a Colorado general partnership (100%)

E.     Partnership interests held by SMT Texas LLC:
 
1.  
St. Mary East Texas LP, a Texas limited partnership (99%) (the remaining 1% interest is held by St. Mary Land & Exploration Company)
 
F.     Partnership interests held by SMEC Texas LLC:
 
1.  
St. Mary Energy Texas LP, a Texas limited partnership (99%) (the remaining 1% interest is held by St. Mary Energy Company)