High Quality Content by WIKIPEDIA articles! Ysleta is a community in El Paso, Texas. Ysleta was settled between October 9 and October 12, 1680, when Spanish conquistadors, Franciscan clerics and Tigua Indians took refuge along the southern bank of the Rio Grande. This is the oldest European settlement in the area that is the present-day U.S. state of Texas. These people were fleeing the Pueblo Revolt in New Mexico.