353C: 1970s, Younger Female Teen Figure Skater, Moves with Family to Rural Part of State, Practices on Perfect Pond next to Burned-Down Mill (Solved!)

I read this novel in the 1970s when I was in early-mid elementary school. The main character and her family live in a state in the upper Midwest; she’s wicked into competitive figure skating and has been training/competing for years. Because of her dad’s job (he might be a college professor), they move from a city to a more rural part of the state where there are no indoor skating facilities and no training. She checks out the lake where the other kids skate, but finds it unsatisfactory (perhaps the surface is always bumpy). She finds a perfect pond! Ice is always clear of snow and smooth. But the locals shun it. She’s happy to train there alone. Eventually, she learns the reason why the spot is shunned by locals. It was a tragedy. The family that owned the mill was holding a party there for their daughter (about the same age as the novel’s main character), there was a fire, and the girl was killed.

349P: Forest Girl Falls in Love with City Boy

I read this as a young adult (I was born in 1976). It was a beautiful novel about a girl who grew up in the forest with little / no interaction with the outside world. I remember she had a vivid imagination and maybe had a magical lake or bog she would visit. She meets someone from the “city” and they fall in love. I seem to remember he gave her gloves and she didn’t know what gloves were. I now have teenage daughters and would love to share this novel with them.
I’ve done a lot of searching with the words girl, lost, forest, tree but can’t seem to figure it out.

347R: Kids hunt for a treasure at a lake only to find it’s confederate money

I read the book in grade school in the early 80's.

I remember it's a mystery book where kids visiting a lake look for a treasure.  In the end, the treasure turns out to be worthless confederate money.  One scene I remember vividly:  The boy is tricked by the girl to swim to the bottom of the lake with his snorkel and look up.  She claims it's a beautiful view.  When he does so, the protective valve on the snorkel opens and water floods into his mouth.

I also seem to recall a dragon on the lake at night, but it's made of paper and burns up from the candles used to illuminate it.  It is possible, however, that this memory might be from another book...