Elongated object over Lac d'Opale in the Pyrenees

Summary

In July 1989, two people watched an elongated object move slowly over the water, rocks, and snow of Lac d'Opale in Estaing (Pyrenees) for about 25 minutes. They described it as having a reddish glow and white lights, entirely silent. No physical traces were found the following day. After reviewing the case, GEIPAN concluded it was probably a red Mylar balloon, though this hypothesis could not be directly confirmed with the witnesses.