Fort Henrietta Historic Park is a public urban park, located in the city of Echo, Oregon, United States. The park is located on the east bank of the Umatilla River and overlooks the original site of Utilla Indian Agency, the first agency for the Umatilla, Cayuse and Walla Walla Indian tribes in 1855 the Oregon Mounted Volunteers built Fort Henrietta on the agency site. The fort and agency were on the west river bank. The park is named for the fort which was named for Henrietta Haller, wife of Major Granville O. Haller, an American military officer during the Cayuse War.