Length/Duration of Races?

[H-man]

I've RTFB and re-RTFB and either this info isn't there or I'm just missing it. :(  So, here goes....

What is the length (whether in milage, number of laps or time) of the following races: Solo GTU; Formula 40; Middleweight Supersport?  ???  

TIA

H-man

[Eric Kelcher]

15 miles for sprints, most tracks the lap count is rounded up so an extra lap this year, RA and Dytona both had/have 6 lap sprints.

GT races are 30 minute timed events, if the time should expire due to red flag it will revert to a sprint lap distance for restart total laps or remaining race depends on circumstance.

[H-man]

Thanks a ton! :D   That's just the info I was seeking.