If you are looking for a great place to take your kids to enjoy anytime of year, Chinguacousy Park is a fantastic choice. Many of Brampton's celebrations take place at at this park, plus they have a ski hill, farm with petting zoo, mini golf, batting cages, tennis courts, splash pool, bandshell, greenhouse and more. The park is located on the corner of Bramalea Road and Queen Street East.
For a list of festivals taking place or some great hiking trails check out the link.