Maybe a dragon fly? There are some huge ones buzzing around. The only other bug I know that might be this big is a salmon fly, but I haven't seen any of those around.
Click image for larger version.  Name: IMG_20130602_125725_939.jpg  Views: 307  Size: 97.8 KB  ID: 7129
Click image for larger version.  Name: IMG_20130602_130636_081.jpg  Views: 295  Size: 95.6 KB  ID: 7130
Click image for larger version.  Name: IMG_20130602_114424_072.jpg  Views: 303  Size: 103.1 KB  ID: 7131