The OneAmerica 500 Festival Mini-Marathon, which takes place in Indianapolis, Indiana, is the largest half marathon in the United States, and the seventh-largest running event in America. As of the 37th running in 2013, it had sold out the entire running field of 35,000 for twelve consecutive years.Commonly known as "The Mini," it attracts runners and spectators from all over the United States and the entire world. In 2011, participants came from all fifty states and nine countries. The race includes a men's and women's running division, as well as men's and women's wheelchair entries. The Delta Dental 500 Festival 5K, a shorter version of the Mini utilizing the same start and finish lines, runs the same day.
The Mini-Marathon began in 1977 and became an official 500 Festival event in 1979. The 500 Festival, a not-for-profit volunteer organization, was created in 1957 to organize civic events celebrating the Indianapolis 500-Mile Race. Over the past 55 years, the 500 Festival has grown to become one of the largest festivals in the nation. The Mini-Marathon is one of the first events of the month of May at Indy.
The 13.109-mile (21.097 km) course currently starts in downtown Indianapolis, includes city streets then heads west toward Speedway. It includes a full loop around the Indianapolis Motor Speedway, then returns to finish in the downtown area. From 1977 to 1992, the race was held the Friday before the Indianapolis 500 (part of Memorial Day weekend). Starting in 1993, the race was moved to early May, the Saturday three weeks before the race except a few exceptions.
The men's record for the Mini is 1:01:52 set by Nelson Oyugi in 2014. The women's record was set in 2010 by Janet Cherobon with a time of 1:10:59.
From 1994 to 2004 it was known as the Indianapolis Life 500 Festival Mini-Marathon.
In 2020, the race was cancelled for the first time in its history, due to the coronavirus pandemic. Entrants from this year's are automatically given invitations to 2021.

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