Dinosaur Ridge in Morrison (always free)               

This park in Morrison, Colorado (southwest of Golden) is really an outdoor museum, where you can hike or drive as you examine evidence of Dinosaur activity in Colorado. One of the popular Colorado attractions for kids.

The kids will love the Dinosaur footprints and other information along the ridge at the various driving stops. There is also a ridgetop hike that is beautiful and interesting, and you can link the hike up with the trails at Red Rocks if you want a longer excursion. Dinosaur Ridge hosts many events throughout the year.

Location:
16831 W. Alameda Parkway in Morrison, Colorado. Map

Friends of Dinosaur Ridge web site, with general information and event listings: 

2013 Events:

Playoff Parties (January 12-20)
Celebrate Playoff Weekends with free admission to Trek Through Time, the exhibit hall at the Dinosaur Ridge Visitor Center. For all fans wearing gear from their favorite pro football team. Check out new exhibits: the Camarasaurus, a Brachiosaurus skull, a Goniopholis skull and a Tryrannosaurus rex footprint. Hike the outdoor trail free or take a guided tour by shuttle bus for $5.

Playoff Party Hours: 10am - 3:30pm, except Sunday 11am - 3:30pm.

Playoff Party Location:
Dinosaur Ridge Visitor Center at C470 and Alameda Parkway.