Residents staying at Boulder hotels are in for a fright this Halloween as the city is invaded by thousands of tiny ghosts.

October 31st this year will see ghoulish goblins, dinosaurs and dragons, fairies and princes, super heroes and a whole host of other characters trick or treating along Boulder's Pearl Street, located in the city's Downtown area.

Kids will want their parents to book their stay at the Millennium Harvest House Boulder to avoid missing out on this event, which features a range of activities to keep them entertained all afternoon.

Julie Kate Photography, on 1805 11th Street, will once again be running the picture costume contest, offering a professional photo in her studio for the scariest youngster.

Families can stop by 8 Days a Week to get a free photo for all munchkins in costumers, before heading on to Mighty Fudge Studios' haunted stairway to pick up some sweet treats.

For adults, there's a chance to visit the Boulder Museum of Contemporary Art Booth on the 1200 block of the Pearl Mall, where youngsters will be able to create their own piece of art to take home.

All this plus much more means it'll be a ghastly and gruesome day out families won't want to miss.