I did my first 100K for 2015 with DH on Jan. 3rd. We mostly rode on the Burke-Gilman and Sammamish River Trails, which were both surprisingly crowded even though it was in the 40s. We saw at least half a dozen other Seattle Randos, including Jan Heine who sped by us in a flash of blue on the BG. It was overcast but not rainy, and the sun came out for part of the ride, which made it feel warmer. We were scheduled to do the Maltby-Granite Falls 100K yesterday, but 40-degree weather and 50-70% chance of rain was way too cold and rainy for me, so DH went without me.