It's to promote world peace. Large groups of people gather together to make a temporary city in a forest. The people are from any ethnic or social background. The goal is promote peace and love. Reminds me a little of the 60's.

In answer to your comment: it will be held in New Hampshire, Vermont, Pennsylvania, West Virginia, Tennessee, North Carolina or Kentucky. here's a website: http://www.welcomehere.org/gathering_of_the_tribes/annual/

i think it's a convention for gays.

"Rainbow Gatherings are temporary intentional communities, typically held in outdoor settings, and espousing and practicing ideals of peace, love, harmony, freedom and community, as a consciously expressed alternative to mainstream popular culture, consumerism, capitalism and mass media. Rainbow Gatherings and the "Rainbow Family of Living Light" are an expression of a Utopian impulse, combined with bohemianism and hippie culture, with roots clearly traceable to the 1960s counterculture. Mainstream society is viewed as "Babylon," connoting the participants' widely held belief that modern lifestyles and systems of government are unhealthy and out of harmony with the natural systems of planet Earth. The original Rainbow Gathering was in 1972, and has been held annually in the United States from July 1 - 7 every year on National Forest land. Other regional and national gatherings are held throughout the year, in the United States and throughout the rest of the world. The largest Rainbow Gatherings pose significant logistical challenges, providing up to 30,000 people with food, water, sanitation, medical care, and order in remote settings. Relations with law enforcement and local communities are frequently an issue. Media coverage is often unfavorable, focusing on drug use, nudity, and the countercultural aspects of the assemblage. Nevertheless, the Gatherings have proven durable phenomena for 38 years." "List of Gatherings - United States Annual Rainbow Gatherings: 2008: Bridger-Teton National Forest, Wyoming 2009: Santa Fe National Forest, New Mexico 2010: To be announced. Council consensed July 9th, 2009 in Vision Council at Parque Venado meadow, New Mexico, to Gather in one of these states: New Hampshire, Vermont, Pennsylvania, West Virginia, Tennessee, North Carolina, Kentucky. - The European Gatherings: 2005 Germany 2006 England 2007 Bosnia 2008 Serbia 2009 Ukraine (Carpathian Mountains between L'viv and Uzhorod.) 2010 Finland - World Gatherings: 2006 Thailand 2008 China 2009 New Zealand" Source and further information: http://en.wikipedia.org/wiki/Rainbow_Gathering (there was no information about a world gathering for 2010)