1. Preakness Stakes

#1 Sports Event (up from #4)
The 137th running of the second jewel in horseracing's Triple Crown attracted a record crowd of more than 120,000 fans to Pimlico Race Course in Baltimore and also featured a concert with Maroon 5 and Wiz Khalifa. Next: May 18, 2013
The 137th running of the second jewel in horseracing's Triple Crown attracted a record crowd of more than 120,000 fans to Pimlico Race Course in Baltimore and also featured a concert with Maroon 5 and Wiz Khalifa. Next: May 18, 2013
Photo: Danielle Lavis Photography
2. Citi Open

#3 Sports Event
The Citi Open, rechristened from the Legg Mason Tennis Classic because of the new title sponsor, drew about 72,000 fans and this year added a Women’s Tennis Association event. Next: July 2013
The Citi Open, rechristened from the Legg Mason Tennis Classic because of the new title sponsor, drew about 72,000 fans and this year added a Women’s Tennis Association event. Next: July 2013
Photo: Jim McIsaac/Getty Images
3. Marine Corp Marathon

#4 Sports Event
"The People's Marathon" sold out its capped field of 30,000 participants this year in a record two hours and 41 minutes and will include events around the race such as the Health & Fitness Expo and the First Timers Opening Night party. Next: October 28, 2012
"The People's Marathon" sold out its capped field of 30,000 participants this year in a record two hours and 41 minutes and will include events around the race such as the Health & Fitness Expo and the First Timers Opening Night party. Next: October 28, 2012
Photo: Courtesy of Marine Corp Marathon
4. Washington Kastles Tennis

#5 Sports Event
Venus and Serena Williams again highlighted the World TeamTennis event, which drew fans including Michelle, Sasha, and Malia Obama. Next: July 2013
Venus and Serena Williams again highlighted the World TeamTennis event, which drew fans including Michelle, Sasha, and Malia Obama. Next: July 2013
Photo: Eric Mendelson
5. The Nation's Triathlon

#6 Sports Event
Acquired by Competitor Group in February, the triathlon expects to continue its streak of sell-outs dating from 2007. Next: September 9, 2012
Acquired by Competitor Group in February, the triathlon expects to continue its streak of sell-outs dating from 2007. Next: September 9, 2012
Photo: Courtesy of the Nation's Triathlon
6. SunTrust Rock 'n' Roll Marathon Series

#7 Sports Event
The race sold out in its first year rebranded as part of the Rock 'n' Roll Marathon Series with 24,000 runners. Next: March 16, 2013
The race sold out in its first year rebranded as part of the Rock 'n' Roll Marathon Series with 24,000 runners. Next: March 16, 2013
Photo: photorun.net