We got to Walden Pond early this morning, really before it was warm enough to swim - not that it stopped us.
We decided to hike a bit until it warmed up, and we made it all the way around the pond (which was level but pretty far, I'd say 2 miles or so).
And we visited the site of the famous "house" - which was a room with a bed, desk, table and fireplace. They do have a replica of the house, but after all the swimming and hiking we did, all members of our party were way too tired to visit it.
The last time I was at Walden Pond was five, maybe six years ago. I read Walden while sitting on the shores of the lake enjoying the serene, beautiful setting and imagining what it must have been like to live in that tiny cabin. It was nice to visit and share the stories of Walden with my kids.