The House of the Seven Gables mansion and historic site in Salem, Mass., offers tours and dramatic presentations about the families who inspired Nathaniel Hawthorne’s famous novel.

AP / House of the Seven Gables

NEW YORK Once upon a time, Halloween was a one-day event. Then the pumpkins and parties started moving back to the weeks between Columbus Day and Oct. 31.

Now the holiday is morphing into an entire season, at least in the tourism industry, with haunted walks, costume balls and pumpkin-carving events held throughout October. Some even begin in early September, like Mickey’s Not So Scary Halloween Party at Disney World ( www.wdwinfo.com/holidays/

halloween.htm.), which started Sept. 5 this year — just four days after Labor Day. In 2004, it opened Oct. 1.

The Illinois Bureau of Tourism has gone so far as to trademark the term “Fall-O-Ween” to describe what it calls the state’s “distinctive fifth season.” Events range from the Morton Pumpkin Festival, already held this year Sept. 10-13, to Six Flags Great America’s “Fright Fest,” which started yesterday, to the St. Charles Scarecrow Festival next weekend. (A Web site highlighting three-day getaways in Illinois for the season launched Sept. 8 at www.enjoyillinois.com/3-day.)

Salem, Mass., which has the most authentic claim on witchy whoopla of just about anywhere, started a Halloween celebration 27 years ago as a one-day event for children. Now the city where witch trials were held in 1692 holds Salem Haunted Happenings ( www.hauntedhappenings.org) from Oct. 2 to Nov. 2 — and gets 30 percent of its annual tourist visitation in that one month.

Highlights include a costume ball at the Hawthorne Hotel, Oct. 31; “Festival of the Dead” nighttime parties geared to adults, and Harry Potter-themed daytime events for kids. At the House of the Seven Gables mansion and historic site, there are tours and dramatic presentations about the families who inspired Nathaniel Hawthorne’s famous novel.

In Ohio, the Cedar Point amusement park’s “HalloWeekends” run from Sept. 12 through Nov. 2 with a parade, a new fun house for little ones and outdoor walk-through attractions ( www.halloweekends.com).

At Universal Orlando, Halloween Horror Nights has been moved back from the first weekend in October to the last weekend of September. The spectacle runs for 23 nights — Sept. 26-27; Oct. 2-5, 9-12, 16-19, 22-26, 29-31; and Nov. 1. Universal Hollywood’s Halloween Horror Nights run Oct. 3-4, 10-11, 17-19, 24-26, 30-31; and Nov. 1. Details at www.halloweenhorrornights

.com/.

In addition to rides, the Universal parks feature haunted houses and “scare zones” where actors in bloody garb may leap out at any moment. Parents are strongly cautioned that the event may be too scary for young children.

Hotels are embracing the Halloween theme, too. The New England Inns and Resorts Association — www.NewEnglandInnsand

Resorts.com — started offering “Ghoulish Getaways” in 2004.

“We have members that tie in to a lot of fall activities — apple-picking, hayrides, mazes,” said Beth Steucek, NEIRA executive vice president.

Some of them also showcase local ghost stories.

The Admiral Fitzroy Inn in Newport has a “Mazes, Ghosts and Fall Fun in Newport” package, available through Oct. 23, starting at $354 per night including two nights’ accommodation, breakfast buffet and tickets to Newport’s “Old Town Ghost Walk.”

The Orleans Inn in Orleans, Mass., on Cape Cod, has a “Hannah’s Haunting Escape” package, named for the hotel’s very own resident spirit. It’s available throughout October, starting at $175 a night, and includes breakfast, a book and DVD about local ghosts.

North Carolina’s Southern Outer Banks is promoting “Ghosts on the Coast” this fall, highlighting local haunted houses, pirate tales and maritime heritage at www.crystalcoastnc.org. In earlier times, the area was nicknamed the “Graveyard of the Atlantic” because some 2,000 ships sank off its coast.

The Ohio State Reformatory in Mansfield, a historic site in a grand gabled building that is no longer used as a jail, offers the “Haunted Prison Experience” with actors, animatronics and props, through Nov. 1, www.hauntedx.com/. No one under 13 is allowed in.

Even the Great Lakes Brewing Co., a brewery and restaurant at 2516 Market Ave., Cleveland (www.greatlakes

brewing.com), is getting into the spirit of the Halloween season, offering a specialty beer called Nosferatu. The red ale is named for the classic 1922 German movie about a vampire.