Marshall Pass is a high mountain pass at an elevation of 3.305m (10,842ft) above the sea level, located in Saguache County, in the U.S. state of Colorado.
Located within the Rocky Mountains of central-southern Colorado, the road to the summit is unpaved. It may be driven by regular passenger cars in good conditions. For the most part, Marshall Pass Road isn't too bad. There are a few rough spots, but a 2WD passenger vehicle can make it just fine if you take your time.
Is Marshall Pass open?
The Marshall Pass Road is closed to wheeled vehicles during the winter months. The drive offers amazing views of the Sangre de Cristo Mountain range. In the summer and late fall, this drive is especially beautiful. On both sides of Marshall Pass and especially in the vicinity of the pass you can find at-large, primitive campsites.
How long is Marshall Pass?
The pass is 48.92km (30.4 miles) long, running from Sargents (US-50) to Mears Junction (Hwy 285). Much of the road follows a former railroad grade for the Denver & Rio Grande over 100 years ago, so it never climbs steeply and to gain elevation, it seemingly winds all around to gain the pass. It was named after Lt. William L. Marshall, of the Wheeler Survey, in 1873.
More info &pics: http://ponchasprings.org/marshall-pass-road.htm