The final container is at the posted coordinates and you can sign it any time, but to log it as found online, you also need to complete this challenge
Your challenge is to find a geocache (or attend an event) in at least 5 of the Big Sky Conference counties. Here's a list of all the counties with a Big Sky conference school in them:
- Coconino county AZ
- Los Angeles county CA
- Sacramento county CA
- San Luis Obispo county CA
- Yolo county CA
- Weld county CO
- Capitol region CT
- Ada county ID
- Bannock county ID
- Latah county ID
- Gallatin county MT
- Missoula county MT
- Grand Forks county ND
- Washoe county NV
- Broome county NY
- Multnomah county OR
- Iron county UT
- Davis county UT
- Weber county UT
- Spokane county WA
It doesn't matter what date your finds were hidden, what date you find them, what type they are, size, terrain, nor what difficulty. As long as between your finds you have at least 5 of the counties from the list, you are victorious and can log this as found after signing.
For the visual learners among you, here is a map showing the different counties as well as the dates they are/were in the conference. Remember, even if the county wasn't in the conference at the date you found your geocache, it is still valid. Anything since May 2000 counts.

Lots of parking all around. Most will cost money if you come during the weekdays during school hours. This can be a high muggle area at times.
Here is a checker to see if you passed the challenge yet:

Here are some other challenges in the series:
GCA69F2: University of Nevada Reno
GCAH18Q: University of North Colorado
GCAH8D5: Portland State University
GCAHTGX: South Utah University
GCAJ0TC: Montana State University
GCAHH74: University of Montana
GCAJ486: University of California, Davis
GCSFTMM: Idaho State University
GCAKJHA: Birmingham University
GCAJBMH: University of Idaho
GCB3W4M: Eastern Washington University