Cruise nights...
Jimmy Cone in Mt.Airy & Home Depot in Eldersburg are probably the biggest. Jimmy Cone is the 1st & 3rd Saturday of each month and Home Depot is the 2nd & 4th Satuday of each month. They both start around 5:00 p.m. and end between 10:00 and 11:00 p.m. The Valley Mall behind J.C.Penny's in Hagerstown was getting a bunch of cars last summer and is going strong again this year.
Biggest car show/cruise around will be the 16th Annual Cruisin' Ocean City May 18th-21st. Registerd cars is limited to 3,000 plus another 3,000-4,000 or more unregistered vehicles and up to 100,000 spectators have attended previous Cruisin� Ocean City events, filling a five square mile area to capacity along the Maryland peninsula. It is an AWESOME weekend !!!
http://www.specialeventpro.com/crusin.htmlhttp://www.occarshow.com/html.aspUPS/United Way Car, Truck & Bike Show at the Laurel UPS facility October 14th is huge and a great show.
Also here are some web sites I have found with lots of show/cruise info.
http://www.carshownews.com/national/MD.htmhttp://www.marylandcarshows.com/http://www.rocknrod.com/states/maryland.htm#showshttp://www.toadmail.com/~mama/ShowsC.htmlhttp://www.runwalkjog.com/carshowstoday/Maryland.htmhttp://www.hubcapcafe.com/calendar/maryland.htmhttp://www.specialeventpro.com/crusin.htmlhttp://www.capitalcruisin.com/cruisein.html#elder