Three weekends of lights along the trails of the Riparian Preserve at Water Ranch in Gilbert Fridays and Saturdays: December 6 and 7, 13 and 14, and 20 and 21    This December the Riparian Preserve comes alive with a holiday glow. Stroll around the candle-lit trail along Water Ranch Lake with hundreds of luminaries and festive light displays. The brisk walk and bright lights are sure to put you in the holiday mood. You'll also enjoy a variety of…