Columbia Park was a baseball field in Altoona, Pennsylvania, which was the home field for the Altoona Mountain Citys of the Union Association (UA) during the league's only season in 1884.

[1] The longest UA game by innings played was played on May 27, 1884, in Columbia Park, with the Mountain Citys beating the Baltimore Monumentals by a score of 3–2 in 13 innings.

[2] The ballpark, which was also sometimes called Fourth Avenue Grounds, was located at Lower Sixth Street, Fourth Avenue, and Mill Run Road.

[3]