EXHIBIT 23.1 CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS As independent public accountants, we hereby consent to the incorporation of our report included in this Form 10-K/A into St. Mary Land & Exploration Company and subsidiaries previously filed Form S-8 Registration Statement Nos. 033-61850, 333-30055, 333-58273 and 333-35352. /s/ ARTHUR ANDERSEN LLP Denver, Colorado, March 22, 2002.