Residents can fish without a license for one day only Saturday as part of a twice-yearly state program.
The Fish and Game Department holds another free fishing day the first Saturday in June, but this is only the second time they've done one in the winter.
Inland fisheries chief Jason Smith says recent weather might make open water levels too high to fish in some places – which means this year is all about ice fishing.
"You can bring your ice skates, have a snowball fight, a lot of people bring out their ATVs, plus you can fish,” Smith says. “It gets people outside. You can build a snowman on the ice, if you want."
While people don't need permits to fish in New Hampshire on Saturday, he says they still have to follow other fishing rules.
Those guidelines, and the places to fish, are at the Fish and Game website.