This is a very pleasant loop that crosses Route 30 for a few miles before stopping at a High's at mile 25.  The last 19 miles are pretty easy and I love the return over Park Heights and Hillside.  There are a couple hills but I would not describe this route as hilly.  It's more rolling or flat with a few hills.  Rain will cancel the ride.  The early start time is designed to miss the nasty afternoon high heat.