The 500 acres of land making up RIM Park border the Grand River, officially designated a Canadian Heritage River in 1994. Native cultures flourished here for over 10,000 years, and more recently it has been central to the agricultural and industrial settlement of Ontario by European settlers. The Grand meanders past towns where many 19th century mills, factories and foundries still stand, and winds peacefully through marshes and forests of sycamore, walnut, hackberry, and other Carolinian species rare in Canada.

RIM Park provides Waterloo area residents with direct access to 1.5 kilometres of the Grand River. The heritage river forms the eastern boundary of the park. A network of riverside trails, world-class brown trout fishing, and many recreation uses including canoeing, rowing, and enriching every manner of leisure activity all combine to make a Grand delight.

The Grand River was recently named the winner of the world's most prestigious River Management Award! Visit The Grand River Conservation Authority to learn more.

Within the park itself is a unique heritage area. The 6th generation Mennonite farm house and surrounding buildings of the Elam Martin Farmstead have been preserved for use as an interpretive centre, potentially allowing for development of programs related to the land's cultural and agricultural heritage.