The 2022 Trail Challenge was a Trail Treasure Hunt and is now complete. The kickoff was Monday May 16th, and then there was a new treasure (clues and map) posted every two weeks.
Here are the links to all the hunts and the winner:
Treasure Hunt #5: https://mountshastatrailassociation.org/2022/07/trail-challenge-hunt-5/
Treasure Hunt #7: https://mountshastatrailassociation.org/2022/08/msta-trail-challenge-7/