"That is in Gillette, Wyoming. It's just a very shallow pond on the north side of Interstate 90, so that's the westbound lane of I-90. The sun angle and an incredibly vibrant algae bloom is what's making those colors." GLOWING ALGAE along Interstate 90, Gillette, Wyoming. www.aopa.org/pilot AOPA PILOT | 67http://www.aopa.org/pilot