Okay, so it’s not a day trip, but the surreal, bioluminescent organisms in Castine Bay do light up the night. See current schedules and pricing. Castine Kayak Adventures, 17 Sea St., Castine. 207-866-3506.
Strike out across Moosehead Lake with a veteran guide. Frequently spotted species include trout, deer, loons, ducks, bobcats, and (fingers crossed) the mighty, magnificent moose. See current schedules and pricing. Northwoods Outfitters, 5 Lily Bay Rd., Greenville. 207-695-3288.
Ride the expedition boat out to rocky Seal Island, then launch your kayak for open-ocean paddling among puffins, arctic terns, and other seabirds. See current schedules and pricing. Old Quarry Ocean Adventures, 130 Settlement Rd., Stonington. 207-367-8977.
Paddle, swim, fish, and scour the sky for bald eagles on this kid- and beginner-friendly trip along the Maine–New Brunswick border. See current schedule and check with guides for pricing. Canoe the Wild, 588 Rte. 1, Weston. 207-551-8729.