Ok... Well, I guess I'm the only one
I'll make a list. Tell me if you've ever heard any of them.
1. Rock Lake Monster- I was told by an elderly gentleman, years ago, that there is a large creature living in the depths of Rock Lake. He said that he's seen on multiple occasions, ducks and geese swallowed whole by something that did not come all of the way out of the water. He said that normally, there was just one large splash and then silence.
2. Depths of Rock Lake- There is a myth that in portions of the lake, the bottom has never been found or that there is a false bottom on the lake. This is supposed to explain the difficulties that searchers have finding bodies of victims.
3. The Rock Lake Curse- It's said that before homesteaders moved into the area, Rock Lake was a very revered and sacred place for the native peoples. When the white settlers moved in and tried to drive the native Americans out, the chief put a curse on the lake that a year would not go by that a white man would not lose his life on the lake, and ever since, there hasn't been a death free year.
4. The Rock Lake Noises- This one ties in with a couple other legends, but it's been said that at night, especially in the late winter and early spring, you can hear the sounds of Native American drums and war cries. It's also said that you can hear steam whistles from old trains and an eerie rumbling can often be heard coming from the location of an old train wreck.
5. Lava Spires- this I know to be at least somewhat true. It is said that in areas of 75'-300' depth, a series of lava spires have grown to within feet and sometimes just inches of the surface. I have seen spikes on my depth finder in areas of 100' of water that have spiked up to just 10' and then back down. This is said to be a contributing factor combined with the high winds of the lake that has attributed to many boat wrecks and drownings.
6. The Ghost Train- Back in the late teens to early twenties, there was said to have been a major train wreck. A train carrying both passengers and a load of brand new Ford Model T's was said to have derailed right along the lake and then plunged into it's murky depths. Some people believe that the lack of light combined with the low oxygen levels of the deep, cold water has preserved the cars in near mint condition.
7. Undercut Cliffs- One of the contributing factors to so many deaths at the lake is the supposed undercut cliffs. The story goes that youths and young adults looking for an adrenaline rush often view the cliffs of Rock Lake as an opportunity to get some energy out while cooling off during the summer. Unbeknownst to them though, just under the surface of the water, the rock cuts back, up and in. Once a swimmer finds them self under the cliff, they try to follow the slope of the ceiling, only taking them further from safety and ultimately their untimely demise.
There are a few more stories I've heard and would be glad to list them, but I really just wanted to see if anyone else has ever heard of any of these stories as well.