Mother's Day Balloon Competition. Oregon Ridge Park, Cockeysville. 7 a.m. liftoff. (410) 837-3030. Free.
Maryland Preakness Celebration Potomac Hunt Races 40th Annual Steeplechase. River and Partnership roads, Seneca. 12:30 p.m. (202) 862-2873. Admission.
Belvedere Square Antique Show. York Road and Belvedere Avenue. 9 a.m.-3 p.m. Approximately 20 dealers sell furniture, collectibles. (410) 239-6427. Free.
Picnic Sunday Cookouts. Boordy Vineyards, Hydes. 1 p.m.-4 p.m. Complimentary tastings, tour of the winery free with Preakness pin. Reservations required. Also, May 17. (410) 592-5015. Admission.
Preakness Polo Classic. Laden Field, Monkton. 3 p.m.-5 p.m. High-goal players from Argentina, Long Island, Florida and Maryland compete. This year's sponsors include Range Rover and Mercedes Benz. In case of rain, to be held at Elkridge Harford Hunt Club. (410) 557-6448. Admission.
Tour Du Pont. Afternoon finish of more than 120 world-class cyclists in downtown Hagerstown in America's premier cycling competition. Morning start on May 12 out of Sharpsburg on the way to the Massanutten Resort in Virginia. (804) 354-9934. Free.
Sunrise at Old Hilltop. Pimlico Race Course. 7 a.m. Tours of Pimlico, including the backstretch, as well as visits with Preakness Stakes competitors. Also, May 12-15. (410) 542-9400. Free.
2nd Annual Ocean City Golf Fest. Held at five courses throughout the Greater Ocean City Area. 7:30 a.m.-6 p.m. Also, May 13-15. (800) 4-OC-GOLF. Admission.
Phillips Preakness Celebration Crab Picking Contest. Harborplace Amphitheatre. Noon. Local celebrities compete to pick the most crab meat. (410) 332-4191. Free.