Randolph last week celebrated the opening of Powers Farm community park at 592 North Main St., which was purchased in 2009 with Community Preservation Act funds and a $500,000 state grant. The 22-acre park has walking trails, a pond, picnic pavilion, a playground for children, and ample parking spaces. “Powers Farm could become for Randolph what the Public Garden is for Boston,’’ said Town Manager David Murphy. Town Councilor Ken Clifton said future phases of development and planning will allow the use of the pond for activities. The town is also looking for public input from residents on what they would like to have at the park. So far ideas include a community garden and paddleboats. The park also will be available to rent for family reunions, church picnics, company outings, and other activities, which will require a Randolph connection. The grand opening festivities on Memorial Day included a salute to veterans with a patriotic sing-along, a cookout, music, dancing, games, fishing, and demonstrations.