I won't know for sure until school starts, but I HOPE to be there.
I'm thinking 1:40, based on the last time I timed mysef up Southgate from the school.

I took a break at the junction, which doesn't show on my timer. So, whih no break I'll likely be even slower....

Garmin reports 11.1 miles, 3238 feet of up.
Markers 1 and 4 on the profile are the junction.

amazingly, the average is only 5.4%