_____ Lake

So for my grammar class assignment, we had to add adjectives to sentences.  (Yeah, it’s fun.  I mean that only partially sarcastically - I get to make up sentences like “The anachronistic thief escaped.”)  One of the sentences was “A _____ lake was nearby.”  I REALLY wanted to find some adjective with that started with “greg-” as a reference to Greg Lake, but the only ones I could find related to social relations or subclasses of parasites.  So there that opportunity was missed….