Union Pacific's Valmy, NV to Skyline, UT coal empty tops 7447 ft. Soldier Summit. Since departing Provo earlier in the morning, the train has ascended 3000 feet in elevation over 50 miles of track to reach this point. However, the climb is not over. From Colton Junction on the mainline, the train will ascend about 500 additional feet in 19 miles to reach the Skyline loadout on the Pleasant Valley Subdivision.