Used this as a faster long run. Supposed to be a 15K, but was long per race director. First race in probably 4 years and only my second race over 10K ever, but it was fun. Incredibly challenging course--especially for me; lots and lots of hills. Also, lots of turns and switchbacks made it tough to keep a good pace, but overall I'm pretty happy. At least an inch of snow on the ground in lots of places made it somewhat slippery considering I was running in road flats, and not trail shoes. Felt like I could have gone another whole bunch of miles at that pace...and that's good for the marathon in the fall.