There was a discussion about Telluride deals (or lack there of) in this thread
. There isn't a 4 day pass, but there is a six day pass for $320. At $53 a day that's not too bad. See HERE
for details. These passes are only available for purchase at events in the four corners states.
There is also a "free day pass".($45) If you are only going to be there for 4 days this is a better deal, though it averages to $63 a day. Picked mine up yesterday as I'll be their for 3-4 days this winter.