In my mind the 1978 Belmont Stakes will always be the greatest race I ever saw, yes I was there that day. Followed closely by Secretariat's Belmont, yes I was there that day too.
Next in my mind is Conquistador Cielo's win in 1982. It was a miserable, rainy day at Belmont. A cold wind was blowing into the grandstand and every seat was wet. As you may know Conquistador Cielo won his Belmont six days after he took the Metropolitan Mile over older horses.
By today's standards that would be two Grade 1 wins in one week by the same horse; A record Woody Stevens set that I doubt Todd Pletcher or anyone else will ever duplicate.