Usually, the reason PE's are reported differently is that the time with which they measure earnings is different. For example one reporting company may choose more recent earnings (quarterly), another may choose year-end figures, and another may think that TTM is more accurate. Given the high PE reported on google finance, and scottrade as you mentioned, I'd assume they're using more recent earnings time frames (which somewhat invalidates my earlier post stating that they might not be as accurate). I haven't looked at Vail's recent earnings, but with the terrible snow season Colorado has had, I imagine Vail has taken quite a dent in their earnings which would lead to a high PE ratio.