Apparently there is an effort to establish a standing record for making a dam to dam run as fast as possible. Here's a video of the "record" run made last September. 188 mi (94 up, and back) in 2 hours 29 minutes and 49 seconds. There's more info in the video notes.
It looked like a blast to me.
Here's a video at 4x speed looking forward. If you ever wanted to see the entire lake in five minutes...