Crystal Socha, 26, of Augusta, Kan., shows her American Paint horse, Summer, during the 11th annual EquiFest of Kansas at the Kansas Coliseum in Wichita Friday, Feb. 29, 2008. 
 
Eleven-year-old Summer holds the Guinness Book of World Records title for the longest tail on a horse at 12' 6".
 

Source:  www.Amazingfacts.com