3.5 Hour Ride @ Silk Sheets

2 hours with Joe, Dana and Matthew in the cold. Added another layer of clothing and headed back out for another 1.5 hours. Did 2 loops alone and stayed at 150 hr steady, zone 2 and matched my pace 18.2 mph both times. Spotted the Iron Data team headed out as I was returning. 3,000 feet of climbing. It was supposed to warm up... what's the deal.