IDPA matches along the Front Range are held on the second Saturday. www.fridpa.com
The second Sunday match is at the range in Dumont/Clear Creek range just west of Idaho Springs. Go here for a map. http://ecouspsa.com/maps/ccpsmap.html
Clear Creek starts at 9:45 and wraps up around 12:30 - 1:00. Side matches usually follow and are completely optional and 100% free.
Feel free to contact me with any more questions you might have.