The ballpark was located in the largely undeveloped Mission Valley region of San Diego.

Constructed for $1 million in private funds by Padres owner C. Arnholt Smith, Westgate was a modern ballpark with a capacity of 8,268 fans, with an eye to be expanded to major league size (up to 40,000) if necessary.

[2] In 1958 when it opened, "Not even Yankee Stadium or Boston's Fenway Park can surpass the comforts and conveniences of the Padres' new home.

[4] The first Padres games played in Westgate were on April 28, 1958, a day-night doubleheader versus the Phoenix Giants.

Plans for Fashion Valley Mall were unveiled in December 1967, and Westgate was razed by 1969 to make room.