MADISON, Wis. (AP) -

State Department of Natural Resources officials say they hope to add nearly 330,000 trout to Wisconsin waters before the inland fishing season opener next month.

DNR fisheries crews have been stocking rainbow, brown and brook trout raised at hatcheries in Nevin, Osceola and St. Croix Falls. Volunteers and students have been helping, too.

The crews are adding fish in waters where the habitat is marginal and there's no natural reproduction.

The season opener is set for May 4.

Interactive maps of trout streams are available on the DNR website's inland trout page.