1969 Fargo Oak Grove vs Ellendale at Ellendale. A late regular season game; ranked #1 and #2 and both undefeated as I recall. Oak Grove won by a basket as Charlie Sizer's shot from deep in the left corner bounced off the rim at the buzzer. Oak Grove won the state title that year. I remember it was a great game but can't recal any details other than the last shot. (It's been a while!!)
The next one was not necessarily the best game I witnessed but it was one of my most memorable:
1965 Wing vs Braddock at Braddock fairly late in the regular season. Wing was undefeated and ranked #3 I believe; this was not supposed to be much of a contest. However, Braddock played tough that night and the game was tied after three quarters. Wing's Ron Pearson, a starting guard, was dressed for the game but hadn't played due to a wrist or arm injury suffered the week before; he was wearing a support brace. He had been begging Coach Bill Michelson to let him play but Bill was reluctant to risk him to further injury. FInally he gave in and let Ron enter the game at the start of the 4th quarter. Well, Ron scored 8 points in the quarter and must have had 3 or 4 rebounds and Wing ended up winning by 8. Not a bad performance for a guy with essentially 1 1/2 arms!