Eric Willhite created the original map and I have added some GPS coordinates to aid in finding the key junctions. Using lat/long (nad 27)
Parked here: 40.1375 -112.7155 Elev 5330
GPS 2: 40.14635 -112.70335 Elev 5070
GPS 3: 40.1623 -112.6798 Elev 5030
Its roughly 2 miles from GPS 3 to the parking area. You will pass a corral as the road bends towards the mountain.
From GPS 3 to Lehi Utah it is roughly over 50 miles (not exact but ballpark figure)