The majority of the walk was wonderful.  I forgot how much I love the sights and sounds of the river as I walk along.  The lush green foliage, the sound of the rushing river, watching the geese and squirrels play in and along the banks of the water.  I needed this as the other option, if the rain had come, was another couple rounds around the Natick Mall. :p
A mile and a half from the car, the sky opened up for a few minutes.  I managed to walk along under some trees, so it wasn't too bad.
Best site today: a young squirrel hanging upside down from a branch to reach some berries on a tree.  When I laughed, he gave me this "What?" look.  His tail was wrapped around the branch and his back claws were dug it - but still, it made me laugh.
I got 3 miles in and included some of the PT stuff: walking on my toes, grapevine on my toes and such  With a little icing and ibuprofen, it feels fine.