Thanks Warbuff! I did my second ride yesterday. 3.1 miles with 400' of elevation change. I was beat. Bad. It's uphill right out of my driveway, then uphill some more to the first turn. From there it goes up and down (around 200' of change total) in less than 1/2 mile. Then uphill for 1.2 miles - and that is 450' of change. I was inspired by some kid ahead of me on a freakin little bmx bike just casually pedaling uphill like he was lickin' ice cream. I, on the other hand, was gasping for breath.
At least the trip down was easier.