In 2010, I scraped data off of the Birkie's website, put it in to Excel, stayed up late a couple nights, and posted a bunch of charts to my ski blog. A couple weeks later, I was up in Hayward, and no less than the head of the Birkie, Ned, said he liked them. Oh, how special I felt. Come 2011, instead of needing to scrape the data from the PDFs, I got them emailed from the Birkie itself! So, there's a preview below, click on it for the current year (or on the year you want for that year's data).
N.B.: the images below are just a preview! There are dozens more where they've come from.
© 2010-2011, Ari Ofsevit / birkieguide.com
Ski, cross country ski, nordic ski