On my way to DIA to pick up some visiting relatives, I stopped by the City Park Fresh Market. Although it was early, the market had a number of visitors.
There were several stands selling produce, including organic produce. The spiced nuts, tamales, bread and pasta (including some gluten free pasta) found at other local markets were also present.
Edited to Add: Great tips for shopping at farmer's markets, including questions to ask when buying produce, here.
City Park Fresh Market
Colfax & City Park Esplanade (in front of East High school, across from Tattered Cover)
9 a.m. to 1 p.m. Sundays, through October 26