I raced Whiteface last year. HT 29 with 2.3 Ikons.
There is not that much single track - a section right around 1/2 way, another section shortly before getting back to the resort, and then the last section before the finish.
I’m glad I had mtb tires and front suspension for a good number of the gravel road descents. Having never raced a gravel race I admittedly don’t have a great sense of what speed is possible for casual racer.
Don’t recall there being too many gravel or CX bikes on the course.
Kris