Free Wi-Fi is coming to two more Chicago parks, courtesy of Google Inc.

Two of the city's busiest parks, Garfield Park on the far West Side and the South Shore Cultural Center on the far South Side, will get free Wi-Fi by the end of the year, joining Millennium Park and five city beaches that have the service.

Google will provide the Wi-Fi for up to three years.

"This is core to our mission, to make the world's information universally accessible by enabling more people to get online," said Jim Lecinski, vice president of U.S. sales and service and head of Google's Chicago office.

Google joins network equipment maker Cisco Systems and Chicago-based broadband provider Everywhere Wireless, which teamed up to provide service at the city's beaches this year, and Silver Communications, which sponsored Wi-Fi at Millennium Park.

The free public Wi-Fi access is part of Mayor Rahm Emanuel's Broadband Challenge effort to increase availability of high-speed Internet access across the city.