Visiting Walden Pond is an incredible experience. The first day we were there, we didn't really know what to expect. We had already decided to walk the 1.7-mile path around the pond before we even got there.
When we arrived, we were surprised to find a public beach. The beach was well maintained and had several lifeguards. The most surprising thing was how clear the pond water was. The day was very hot and very humid, and after we were about halfway around the pond, it started looking mighty tempting. We came across a tiny little sandy area with absolutely no one around, so we jumped right in, clothes and all! The water was clear and warm, and we could see right to the bottom of the pond. During our swim, we met Linda Allen, a Walden Pond photographer. We had a great conversation with her, and later we bought one of her posters in the gift shop. We were cooled down and refreshed, so we finished our walk around the pond and then found a nice shady private spot and ate a picnic lunch that was prepared for us by a local deli.
It was a romantic, relaxing day that we will never forget. This is place for transcendental meditation! You can easily find a private spot with no one around. It is very quiet here as long as you are away from the beach. The beach gets very crowded at times, and they will stop letting new people down to the beach on extra busy days. Try the beach during the week rather than a weekend.
It is somewhat service dog-friendly. Be prepared to be stopped SEVERAL times to be told that you are not allowed to have a dog there. Some of these times will be by other tourists, not just the officials. Don't think that the vest your dog is wearing that is clearly marked "Service Dog" is going to help. It was like it was invisible here.