Rogers Park Pond in Danbury is part of the Community Fishing Waters, a state program that encourages fishing in urban areas.  Saturday marked opening day of trout fishing season.  The Department of Energy and Environmental Protection began the stocking in late February of more than 315,000 trout in nearly 100 Connecticut lakes and ponds and 130 rivers and streams.   DEEP will continue releasing trout through mid-to-late May. DEEP officials expect approximately 507,000 trout will ultimately be stocked.  Families had an opportunity to help stock trout at nine of the parks on opening day.  Three spots along Leadmine Brook in Harwinton in the Roraback Wildlife Management Area weren't stocked due to beaver activity.