There was a wye in Silverplume but I-70 cut the line off from it.
The end of track at Devilsgate is pretty much as far as the land goes. There is a @#$%& right around the corner that snatched up the right of way apparently with a mineing claim. even if it did extend further, the line rides the canyon wall at that point and there wouldnt be room to turn there either.