A few mentions..
Fri - Heaven on Earth Festival - Denver 6-10p. Featuring edible art projects, cocoa butter chair massages, tarot readings and art
Fri-Sun - Climb4Life Colorado- climb-fest with clinics, yoga, parties, gear giveaways, free massages, and goodie bags— your money goes toward finding a cure for ovarian cancer. Various canyons around Boulder.
Sat - Sun - Lyons - Art on Apple Valley Road - 10-5 think Open Studios in Boulder - see artists Sarah Kinn, Juli Lunk and others +++ Check out the sculpture trail in downtown Lyons.
Sun - Niwot's Whistle Stop Sunday Market. The farmers market runs every Sunday from 10am to 2pm, through Sept 16, at Whistlestop Park, on the green next to the Bandstand.
Thursdays in Denver - Fashion on the Riverfront - good fashion, cocktails and scene.