I’ve driven Watkins Glen, too.
(That’s me behind the wheel, instructor in the passenger’s seat, coming out of the esses onto the back straight.)
Two days in July 2003 (pictured) and three days in July 2005, a total of about 185 laps, 620 miles, in my stock 2003 Nissan 350Z. My best lap was 2:25.5, averaging 83.4 mph, with a top speed on the back straight of about 125.
It’s called High Performance Driver’s Education (HPDE) and although I haven’t been involved for ten years, it was my primary hobby for more than 12 years: 135 track days at 20 tracks in eight cars.