Saturday, March 13th, 1993
Crazy Horse, Boise ID USA
source: consensus of some Boise fans
With Treepeople and Hive.
First Built To Spill gig.
This date has long been unverifiable, narrowed down to March 1993; a Boise native and long-time follower of BTS, Treepeople, SOC etc. is vouching for this date based on the fact that he couldn't make it due to a conflict with a bachelor party. Bummer, but I think he probably made the right decision.
Thanks to Mark for the detective work on this, and to everybody who contributes data for this site... especially about the old days.