RCT3 - Highest Rollercoaster [World Record] 273,000 ft / 83km 

I did it. I spend 4 hours using an autoclicker and I think this is the world record. At the end the game gets so laggy it takes 1 second to place a new track piece, even on a good computer, so I started using the longer track pieces so it wouldn't take so long.
For some reason, the original "Highest drop height" was very incorrect, so I used the "Ride lenght" and divided it by 2
Test results:
Speed results:
Max. Speed: 7335.37 mph (11804 km/h)
Average speed: 1306.39 mph (2101 km/h)
Ride time: 4:45
Ride lenght: 547685.75 ft (166 Kilometer) (103 Miles)
Drop results:
Total 'air' time: 0:08
Drops: 43
Highest drop height: 273842.87 ft (83 Kilometer) (51 Miles)
Number of inversions: 0
Force results
Max. positive vertical G's: 305.14 g
Max. negative vertical G's: -177.82 g
Max. lateral G's: 691.20 g
Cheats:
John Wardley (removes height limit)
David Braben (removes launch/chain lift speed limit)