I have done this ride for several years. Beautiful, rolling route, a challenging century (though there are shorter as well as longer routes). Very well marked and run, with good food stops.

There's lots of parking at the start, which is only a mile from the Katonah train station.

I would plan to get a bite to eat at the Katonah Diner afterward, just across the street from the train, on the corner. They served us a tasty lunch on the patio, on one of Bob & Russ's rides this summer.

And donate a few extra bucks to the Friends of Karen--it's a fundraiser.