Hy-Vee Gas ← View details 1503 4th Street Southeast, Mason City, IA 50401 +1 641-423-0699 hy-vee.com Suggest an Edit Name* State* Locality* ZIP* Street address* Phone* Website Opening hours Sunday: 05:30 am — 11:00 pm Monday: 05:30 am — 11:00 pm Tuesday: 05:30 am — 11:00 pm Wednesday: 05:30 am — 11:00 pm Thursday: 05:30 am — 11:00 pm Friday: 05:30 am — 11:00 pm Saturday: 05:30 am — 11:00 pm Your comments * — Required information