Justin's: How I built a peanut butter company and sold it for $281 million

Justin Gold got his homemade nut butters into Whole Foods, but still couldn't turn a profit — until a mountain biking ride inspired a new product that put Boulder, Colorado-based Justin's on the map. For more on how Denver and Boulder have rebuilt themselves as centers of business and industry, check out CNBC's primetime special, "Cities of Success: Denver & Boulder," premiering Thursday, April 11 at 10pm ET/PT.