(Tigard, OR)  --  Hot air balloons will be flying over Tigard this weekend.  Fifteen balloons will be taking part in this year's Festival of Balloons, which is today through Sunday.  The balloons will lift off from Cook Park early each morning, and then again at dusk for the Night Glow.  The festival includes carnival rides, live music, a car show and a beer garden.  Of course, the Festival of Balloons will also be offering tethered hot air balloon rides.