For those who are interested in doing fun things in Colorado but are limited in cash, several options will prove worthy of their consideration. Colorado has so much to offer, from the natural to the historical.
The great outdoors shall be your friend. There are trails along the Front Range and the Western Slope that are great for hiking and biking. There shall also be other places you can go biking, such as at the state parks of Breckenridge and Silverthorne, with their lower-altitude bike parks that are easy to ride.
You can then go for wildlife watching in Colorado. Animals such as elk, moose, bear, birds, and other species shall emerge especially in spring all over the forests and trails. You can visit the National Wildlife Refuges, which are free and open to the public, where you shall see plenty of fish, wildlife, and natural areas.
There are also the Colorado breweries and distilleries, which are always at full production especially as the festive seasons near. You can tour these facilities for free, and engage in their tasting sessions in the taprooms and at the pubs. If alcohol is not your thing, you can go for the Celestial Seasonings tour to taste the country's largest specialty tea's blends. There is also the Hammond's Candies' free factory tour, which is guaranteed to satisfy any sweet cravings you may have. You can check this site for further info.
There are also the natural sites, such as the Garden of the Gods in Colorado Springs. There shall be some amazing geographical formations such as cathedral spires and kissing camels. You can also catch a bit of history at the Colorado Springs Pioneers Museum, as well as visit the U.S. Air Force Academy in the area. There shall also be the one-person stone and iron project near Rye, Colorado. This is a structure called Bishop Castle, which the man Jim Bishop has been building for over 60 years. He allows visitors to tour the castle for free any time of the year.
You can also take in the beautiful scenery of the region through a drive. Its twisting mountain passes and scenic byways make for a fun and thrilling experience. You can also visit the attractions along your way, to make for an interesting road trip.
You should then make time to relax now and unwind at the end of the day. There shall be plenty of natural hot springs spread all over the region. There shall be discounted rates you can take advantage of, and assure you of a good time while at it.