Is it really too much to ask an adult to do a little research about skiing before decisions and choices are made? The internet provides instant data about everything, including skiing. It is really not that hard to figure out.
In this example of a Dad in Denver - are we really going to suspend disbelief that a person living in Denver has zero ideas about skiing and is going to go to a major resort to get his kid some skiing experience?
A little googling lead me to:
Closest ski area to Denver - self proclaimed by Echo Mountain
Top 9 Affordable Ski Resorts in Colorado
While many skiing and snowboarding seem out of reach to most without a pre-purchased season pass, there are still some resorts in Colorado with affordable lift tickets. Consider some of Colorado's lesser-known ski resorts for their laid-back atmosphere and cheaper day passes.
www.uncovercolorado.com
This applies to wherever you live. Here in the NY/NJ metro, we took our kids to Campgaw, Mt Peter, Thunder Ridge, Tuxedo Ridge (closed around 2016), Hidden Valley (converted to a non-profit National Winter Activity Center in 2016) for their early skiing days. Now you can even do a basic beginner package indoors in the Meadowlands at Big Snow.
It just takes a few keystrokes to figure it out.