Drive south out of Carbondale, CO on 133. Follow Schofield track logs 1, 2, 3 and 4. Marble, CO is the first town. The marble quarry here produced the marble for the Lincoln Memorial in Washington, D.C. and the tomb of the Unknown Soldier. The trip to the restored mining town of Crystal, CO is an easy trip. It is somewhat narrow and in peak season it is heavily traveled. Schoelfield Pass begins at Crystal. It is a beautiful trip along the Crystal River. It is narrow and impossible to pass on much of the trail. Some spots allow only inches to spare when squeezing past boulders.
The road bed is very solid and can be driven safely. A spotter is highly recommended for the narrowest areas and in case you would have to back up to yield to other traffic. The direction from Marble to Crested Butte is mostly up hill. Oncoming traffic would be required to yield to the ascending traffic. There is a nice rocky stream crossing then an easy trip to Crested Butte.