Like any downtown sports facility, Chase Field utilizes the established parking infrastructure for its guests. An attached 1,500-car parking garage provides parking for guests on the Infiniti Diamond Level.
Away from the park, downtown Phoenix boasts some 33,000 parking spaces within a 15-minute walk of Chase Field. The Diamondbacks estimate that about 15,000 spaces are necessary to accommodate a sellout crowd.
For additional information regarding parking downtown and detailed parking maps of the area, the Diamondbacks web site is a good resource.
For those of you who would rather not drive to the game, the Phoenix public transportation offer bus service that will deliver you to the ballpark.
Chase Field also has a light rail stop for use by the fans. The light rail will continue to run for 45 minutes after the final out to allow all fans to catch the train regardless of how long the game lasts.