Checkpoint. Partly sunny, cool - high 30's to low 40's, mild North wind < 5mph. Finally got down to riding several forest preserves in Naperville and found some good connector trails and roads. Some nice views but the DuPage River is kinda ugly. For some reason they designed Springbrook Prairie FP where all the trails are around the perimeter, so you hear the ever present traffic noise of Naperville over the whole ride. On the East part, upper trail is limestone, lower part is grass, which made for a rough ride. DuPage River trail and River Park were pretty cool, as was the Greene Valley FP. Lots of hikers out, not that many bikes. I was on the edge of cold for the entire ride. Probably should have worn a long sleeve base layer and ear covers and definitely picked the wrong inner gloves, as my hands were really cold the last hour of the ride. I would ride this again with some route changes - there are several other parks and FPs to connect to. Also had to cut out a couple of sections: Greene Valley FP roads through the old dump are not open so I had to re-route; Return section of the DuPage River Park had a woodland trail that was muddy, narrow and full of hikers, so I opted to take the pave route instead. Both of these on the fly changes cut the route mileage by about 2 miles.