Thunder Lake is a Provincial Park about 20 km from our town. It's free for day use at the beach (yay!) which was quite rocky. It took a while for C-note (our sensitive boy) to get used to the rockiness of the sand, but was very excited that we went to the beach. He keeps asking if we can go back. We made some gravelly sand castles and had a blanket lunch. We had to pull little leeches off our feet after wading in the water (yeah, gross) but the water was warm. Not really a swimming beach with all the algae and leeches.