Memory is fading a bit. I guess I got the biplane ride about ‘73 To ‘76 when we went to one of my Mom’s Uncles 50th wedding anniversary somewhere south of Coeur d’Alene.
According to Heather Hart, “Henley Aerodome was founded in 1973 as posted on [Clayton] Henley’s grave stone.” The earliest reference which has been located to the Henley Aerodrome was its listing in the 1976 AOPA Airport Directory (according to Chris Kennedy). The earliest depiction which has been located of the Henley Aerodrome was a 9/19/76 aerial photo. It depicted Henley as having a single northeast/southwest runway.
“Abandoned & Little-Known Airfields in Northern Idaho”
I was there between ‘88 and ‘92.