Seems to be a lot of old people here on the Over-50 forum!
My specs:
First photo on a tricycle - 1956 - 63 years ago
First two-wheeler (Philips single-speed) - 1964 - 55 years ago
First ten-speed (Raleigh Record bought with paper route earnings) - 1968 - 51 years ago
First fully-loaded bike tour - 1975 - 44 years ago
First century ride (actually the Davis DOUBLE Century) - 1977 - 42 years ago
First Deathride - 2018 - 1 year ago
I've ridden bikes pretty continuously since getting that Philips in 1964. Initially for transportation and paper route duties, but I really got into riding as recreation and fitness in around 1973 and am still going strong.