Largest gathering of people wearing undergarments

According to Official Guinness Records,

The largest gathering of people wearing only underwear was achieved by 2,270 participants (all USA) at the Utah Undie Run in Salt Lake City, Utah, USA, on 24 September 2011.
Participants were gathered in a single area in accordance with guidelines before the run itself began. The event was organised to challenge the perception that Utah is an "uptight" state.

For a complete list of 2011 records, please visit 2011 Guinness Records in United States.

Related Images

Other United States records that might interest you:

• Largest Carolina shag dance
• Largest collection of olive oil bottles
• Largest air guitar ensemble
• Most people apple bobbing
• Most saves in an American League baseball career
• Longest unicycle rail grind
• Most hours on US television
• Largest collection of Charlie's Angels memorabilia
• Most blooms in 1 night, same plant (Night blooming cereus)
• Longest aluminium can chain
• Fastest completion of The Arena in Kirby Superstar (Nintendo, 1995)
• Largest stir-fry
• Most pubs visited in 24 hours by a team
• Tony Awards