There are lots that the venue uses all around the immediate area, Parking in these lots usually requires a ticket/pass.
I always park at 'The Mall in Columbia' located at 10300 Little Patuxent Pkwy, Columbia, MD 21044. It's about a 5-8 minute walk to Merriweather. There is free parking at the mall for customers of Union Jack's Pub which I usually visit before the concerts.
There's parking right outside venue, but fillf fast. Covered parking only couple blocks (do bring your umbrella, JIC!) & for some events frequent golf carts to ferry you to from parking. Also special, covered lots for handicap (must have permit).
Go to the Merriweather website and get a parking pass. They're free. There is no parking allowed at the Columbia Mall for events. But the parking pass system works well for the most part. Directions and map are accessible when you select a parking option.
There's an option for a free parking spot in one of the lots with each ticket purchase
If you park in their designated garages be prepared to sit for a long time to get out - last concert i was stuck for 50 mins - not fun!!
Be careful about parking at Columbia Mall because I hear that they are cracking down on parking for events there because you don't want to risk your car being towed! Check out parking options online
You choose a parking lot location when you purchase your tickets. All parking is free and it's a very short walk to the venue.
I second Randy, you should get a pass after your tickit is purchased its a short walk to the venue but they will ask you what lot you want
Thanks! Your answer is awaiting moderation.