To be sure, the first three on the list are connected to tourism overall, although there's nothing wrong with people traveling to Colorado — especially if the reasons are far more diverse than just "skiing."
La Voz sums it up:
Colorado’s dependence on the extraction industries for its economic well-being has put long-time residents through a historical roller coaster ride of boom and bust cycles. Those days may finally be behind the state with low unemployment rates, some of the fastest growing companies in the country and a diversified set of industries drawn to the state. Now the state’s largest employers are from the Aviation, Healthcare, Telecommunications and Financial Services industries. The new mix of companies has provided sustained growth and an economic engine that keeps Colorado near the top of the class.