Punkin Chunkin Colorado | Aurora Jack-O-Launch (annually, 2nd Saturday in October)
This October festival has become a Denver tradition.
Free Summer Bowling For Students at Brunswick Bowling Centers
Brunswick Bowling Centers are offering free bowling for students during the summer of 2012. Kids or their parents (depending on age) sign up for Brunswick's Bonus Zone to get free bowling.
There are a few Brunswick Bowling Centers along the front range that offer the free bowling for kids promotion.
Find a bowling center: 
Bonus Zone Sign up:
Rocky Mountain Arsenal Wildlife Refuge | always free
The free Rocky Mountain Arsenal Wildlife Refuge in Commerce City, Colorado (near Denver) is a beautiful and pristine National Wildlife Refuge, representing an impressive cleanup and conversion of a former weapons and rocket fuel processing facility. The views of the mountains from this perfect spot on the plains are quite impressive.
2017 National Park Free Days
The National Park Service offers free entrance to all National Parks a few times each year. This is a great way to explore our beautiful Colorado park lands.
Community Car Show and Drag Race
The annual Community Car Show in Littleton takes place Saturday September 12th, 2015, from 10am to 2pm. Admission is free both for spectators and exhibitors. The car show takes place at Heritage United Methodist Church and will include music, free snacks, and you will vote on the People's Choice winner.
After the car show, a drag race takes place from 4pm - 8pm at Bandimere Speedway in Morrison. Admission is free for spectators, and $30 for racers.
You are encouraged to bring a canned food item or good condition used winter coat or boots.
When:
Saturday September 12, 2015
Car show runs from 10am to 2pm.
Drag race runs from 4pm to 8pm.
Where:
Car show takes place at Heritage United Methodist Church:
7077 S. Simms Street
Littleton, CO 80127
(next to Chatfield Sr. High)
Drag Race takes place at Bandimere Speedway in Morrison:
Immediately off the C-470 Morrison exit.
Copper Country Music Festival (Labor Day Weekend)
Each year over Labor Day Weekend, Copper Mountain Ski Resort hosts the free Copper Country festival, with two full days of country, blues, and folk music from top name performers.
Morrison Nature Center at Star K Ranch, Aurora (always free)
The beautiful Morrison Nature Center is a free park in Aurora, Colorado that is definitely worth checking out when you are in the area.
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Shell Gas Two For One Ski Ticket
For 2014, Shell gas stations are offering 2 for 1 vouchers at several ski areas with a 10 gallon gas fill up. This means that if you buy at least 10 gallons of gas, you get a coupon good for a free lift ticket if you purchase one full price adult lift ticket. The deal is good at several ski areas.
Unfortunately, full price adult lift tickets have become so expensive that this isn't much of a "deal". But if you just want to ski one day at a participating resort this year, this will get you on the slopes for less than full price.
In Colorado, 2014's participating resorts are:
Copper Mountain
Crested Butte
Loveland
Monarch
Powderhorn
The SkiFreeDeals.com web site has a full list of participating Shell stations and ski resorts.
Learn more at skifreedeals.Com:
Underhill Museum | Idaho Springs | Always Free
The free Underhill Museum is a small but quaint depiction of early life in downtown Idaho Springs, with several rooms set up to display a typical home setting in the early 1900's. The kitchen in particular is very elaborate, and during better weather the Victorian Garden is open to the public. In addition, there is an old vault, antique cash register, and many photos of Idaho Springs through the years.
This free museum earns revenue for the History Society of Idaho Springs with a bookstore located at the entrance. They have an excellent selection of Colorado books as well as a large used book inventory.
This is a nice free historical museum to visit while browsing the shops in downtown Idaho Springs. I'm no fan of tourist trap shops that are full of cheap imported junk, like many of the shops in more popular Colorado tourist destinations. The shops in Idaho Springs are not like that. Many feature locally made artisan works for reasonable prices.
Fall and Winter hours 2011-2012:
Saturday, Sunday, and Monday 11am to 5pm.
Location:
The Underhill Museum is at the western end of the strip in downtown Idaho Springs on Miner Street. Look for the sign that says "Books".
While you're in the area check out the Visitor Center and Heritage Museum at 2060 Miner Street.
Historic Idaho Springs site:
Loveland Ski Hooky Days (Second Thursday Monthly)
For the 2019 ski season, Loveland Ski Area and 95.7 The Party FM are offering $25 lift tickets on the second Thursday of each winter month.
They also offer a 2 for 1 ticket for the following week if you can't attend on Thursday. To get the $25 price, or the 2 for 1, you have to go to the "95.7 The Party" web site and sign up as a "Party VIP", then print the coupon.
When:
Thursday, February 14th, 2019
Thursday, March 14th, 2019
Where:
Loveland Ski Area is located off of I-70 just before Eisenhower Tunnel. Take the Route 6 exit (Exit 216) and you can't miss the ski area. Loveland is broken up into 2 distinct areas with a shuttle bus that runs between them. Loveland Valley (left off the exit) is considered the learning and training area and Loveland Basin (right off the exit) is the main ski area. A shuttle bus runs between both.
Liftopia Ski Discounts
Colorado resorts offering substantial Liftopia ski discounts:
Arapahoe Basin.
Copper Mountain.
Durango.
Loveland.
Monarch Mountain.
Ski Cooper.
Sunlight.
Winter Park.
Some other resorts have discounts on Liftopia that really aren't discounts at all.
Check out Liftopia:
Rentals
If you need to pick up rentals on your way to the mountain, my favorite super cheap rental shop is Maison De Ski in Idaho Springs.
New Belgium Brewery Tours (Tuesday - Saturday)
The New Belgium Brewery in Fort Collins has had to greatly modify their previously awesome tour and beer sampling system. They never said why they changed, but it was obvious what the problem was when I visited. Because of the free beer samples, the place was overrun with college kids who wanted to party hard for free.
Now to get a small free sample you must take the full brewery tour, and reservations fill up online weeks or months in advance. If you go there without being signed up for a tour, you can still buy beer at the bar for a discounted rate.
Despite the changes, this is still an excellent small brewery to see and learn about.
Location: 500 Linden Street in old town Fort Collins.
Liquid Center Hours:
Tuesday - Sunday 10am to 6pm
Closed on Sundays until Feb 9th, 2014.
Guided Tour Hours:
Tuesday - Sunday 11am to 4:30pm
Closed on Sundays until Feb 9th, 2014.
New Belgium Beer Web Site:
Peterson Air & Space Museum, Colorado Springs (always free)
The Peterson Air and Space Museum has one of the better displays of vintage and historic military aircraft in the western United States.
Willie G's Denver Happy Hour (Downtown Denver)
Willie G's is a great place to have a happy hour snack and a cocktail in the middle of the 16th Street Mall in downtown Denver. The street facing patio allows diners to relax with a drink and watch Denver tourists and businesspeople pass by.