Although the ranking cited other colleges’ fitness facilities and initiatives, it was apparently the chow that earned Oles 23rd place:
St. Olaf’s food service program specializes in fresh, local food prepared from scratch. While many U.S. college dining halls feature old standbys such as grilled cheese, burgers, and pizza, St. Olaf takes the time to explore different cuisines including Indian, Mexican, and Thai. Though they’ve still got the grilled cheese, St. Olaf offers dishes like North African spiced chicken with cilantro cucumber yogurt sauce, seitan sloppy joes with pineapple cole slaw, and gado gado (an Indonesian dish consisting of vegetables and a peanut sauce).
You can see the full list and methodology notes here.