Classic skis, but skated whenever it was convenient/faster. So, I flew. Other than a 9:00 mile on Eagle Trail where I tried to Classic ski up the hills, I was able to skate FAST on the flats and uphills, and I was screaming fast in the tracks on the downhills. Best of both worlds, really. Honestly, I feel like I could Skate Ski the Birkie on my classic skis and do quite well. Weird.