i rode in college in denver about 3 years ago on my 01 spirit 750 and it was like -15F or so. but it was a dream night for a ride, nobody on the roads, no sand from recent snow storms, just everything you could want for a winter ride in CO. i had all my ski clothes on, and a nice THICK indiana jones style jacket. had my under armor head wrap under the full face with the hoodie's hood on it. winter socks and my winder red wing boots. it was a nice ride, about 30 miles one way, lots of highway, i had a blast!!!