Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0287
Expires: January 31, 2005
Estimated average burden hours per response... 0.5

(Print or Type Responses)
1. Name and Address of Reporting Person *
Hertzler Jerold M
  2. Issuer Name and Ticker or Trading Symbol
ST MARY LAND & EXPLORATION CO [SM]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
VP- Business Development
(Last)
(First)
(Middle)
1776 LINCOLN ST., SUITE 700
3. Date of Earliest Transaction (Month/Day/Year)
06/24/2008
(Street)

DENVER, CO 80203
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock; $.01 Par Value 06/24/2008   M   4,058 A $ 12.03 14,333 D  
Common Stock; $.01 Par Value 06/24/2008   M   3,634 A $ 11.95 17,967 D  
Common Stock; $.01 Par Value 06/24/2008   M   4,058 A $ 7.965 22,025 D  
Common Stock; $.01 Par Value 06/24/2008   M   3,634 A $ 12.5 25,659 D  
Common Stock; $.01 Par Value 06/24/2008   M   3,634 A $ 12.525 29,293 D  
Common Stock; $.01 Par Value 06/24/2008   M   3,632 A $ 13.35 32,925 D  
Common Stock; $.01 Par Value 06/24/2008   M   2,902 A $ 12.66 35,827 D  
Common Stock; $.01 Par Value 06/24/2008   M   544 A $ 13.39 36,371 D  
Common Stock; $.01 Par Value 06/24/2008   M   3,082 A $ 14.25 39,453 D  
Common Stock; $.01 Par Value 06/24/2008   S   29,178 D $ 62.3618 10,275 D  

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number. SEC 1474 (9-02)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option(Right to Buy) $ 12.03 06/24/2008   M     4,058   (1) 06/30/2012 Common Stock 4,058 $ 0 0 D  
Stock Option(Right to Buy) $ 11.95 06/24/2008   M     3,634   (2) 09/30/2012 Common Stock 3,634 $ 0 0 D  
Stock Option(Right to Buy) $ 7.965 06/24/2008   M     4,058   (3) 09/30/2011 Common Stock 4,058 $ 0 0 D  
Stock Option(Right to Buy) $ 12.5 06/24/2008   M     3,634   (4) 12/31/2012 Common Stock 3,634 $ 0 0 D  
Stock Option(Right to Buy) $ 12.525 06/24/2008   M     3,634   (5) 03/31/2013 Common Stock 3,634 $ 0 0 D  
Stock Option(Right to Buy) $ 13.65 06/24/2008   M     3,632   (6) 06/30/2013 Common Stock 3,632 $ 0 0 D  
Stock Option(Right to Buy) $ 12.66 06/24/2008   M     2,902   (7) 09/30/2013 Common Stock 2,902 $ 0 0 D  
Stock Option(Right to Buy) $ 13.39 06/24/2008   M     544   (8) 10/22/2013 Common Stock 544 $ 0 0 D  
Stock Option(Right to Buy) $ 14.25 06/24/2008   M     3,082   (9) 12/31/2013 Common Stock 3,082 $ 0 0 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Hertzler Jerold M
1776 LINCOLN ST.
SUITE 700
DENVER, CO 80203
      VP- Business Development  

Signatures

 Karin M. Writer (Attorney-In-Fact)   06/26/2008
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) The total option vested as follows: 1,015 shares on June 30, 2002, 1,015 shares on September 30, 2002, 1,014 shares on September 30, 2003, and 1,014 shares on September 30, 2004
(2) The total option grant vested as follows: 909 shares on September 30, 2002, 909 shares on September 30, 2003, 908 shares on September 30, 2004, and 908 shares on September 30, 2005.
(3) The total option grant vested as follows: 1,015 shares on September 30, 2001, 1,015 shares on September 30, 2002, 1,014 shares on September 30, 2003, and 1,014 shares on September 30, 2004.
(4) The total option grant vested as follows: 909 shares on December 31, 2002, 909 shares on September 30, 2003, 908 shares on September 30, 2004, and 908 shares on September 30, 2005.
(5) The total option grant vested as follows: 909 shares on March 31, 2003, 909 shares on September 30, 2003, 908 shares on September 30, 2004, and 908 shares on September 30, 2005.
(6) The total option grant vested as follows: 908 shares on June 30, 2003, 908 shares on September 30, 2003, 908 shares on September 30, 2004, and 908 shares on September 30, 2005.
(7) The total option grant vested as follows: 726 shares on September 30, 2003, 726 shares on September 30, 2004, 725 shares on September 30, 2005, and 725 shares on September 30, 2006.
(8) The total option grant vested as follows: 136 shares on October 22, 2003, 136 shares on September 30, 2004, 136 shares on September 30, 2005, and 136 shares on September 30, 2006.
(9) The total option grant vested as follows: 496 shares on December 31, 2003, 862 shares on September 30, 2004, 862 shares on September 30, 2005, and 862 shares on September 30, 2006.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.