The Jefferson County Public Library offers FREE passes to the Denver Museum of Nature & Science, Butterfly Pavilion, Denver Firefighters Museum, Dinosaur Ridge, the Denver Trolley, Golden History Museums, History Colorado Center, MCA Denver. Molly Brown House, Rocky Mountain Quilt Museum and Denver Museum of Miniatures, Dolls & Toys.
Passes are available in limited quantities each day and allow different numbers of people to enter the attraction at no cost. You must have a current JCPL library card (you’ll need the number handy to get your pass), but any Colorado resident can get a card, as long as you present some sort of photo ID at any one of its library locations.
Because the Culture Pass page can be sorted by date, the simplest method is to pick your day and see what’s available.