This is the September otherkin gather at Four Quarters Farm, the cousin of Walking the Thresholds (June). This website is intended to replace the old page at http://ctt.oxelot.com, so update your bookmarks/links.
They also have a tumblr: http://crossingthethresholds.tumblr.c
(NB: I am not affiliated with this event, just happened to see this link going round my internet sphere. I've actually never managed to attend CtT for both general logistical reasons and the fact that several years it was scheduled the same weekend as my own MythiCalia.)