There are seven established trailheads in the "northwest" corner of the Uintas, each accessible via SR-150 aka The Mirror Lake Highway. The trail to Hell Hole is not represented... should it be?
Having been to each one except the Middle Fork Blacks Fork, I can say that the road conditions can vary from quite smooth, graded dirt road to several very rocky sections. East of Elizabeth Pass and between the turnoff for the West Fork Blacks Fork TH and the East FOrk Blacks Fork turnoff are both in pretty bad shape. Surprisingly, the 5-6 mile road to the East Fork Blacks Fork TH, which is deep in the forest, is in exceptionally good shape.