Tres Ojos de Agua (the three eyes of the water) was named for the three springs in the upper westside of Santa Cruz, California: the spring at the Kalkar quarry at the upper end of Spring Street, the spring at Messiah Lutheran Church and the spring at Westlake pond.

This site has been created as a community resource to highlight stories from the early history of Santa Cruz, especially the upper west-side neighborhood. The original Rancho Tres Ojos de Agua consisted of 176 acres in a triangle shape. The point of the triangle is at Mission Hill Junior High School, the eastern border stretches to Harvey West Park and the Western border stretches up Laurent and Spring Streets to a point just below Coolidge drive on the UCSC campus.