Lizard Head Pass, Road mountain pass in San Juan Mountains, Colorado.
Lizard Head Pass is a road mountain pass on State Highway 145 that crosses the San Juan Mountains in Colorado. The pass connects Dolores and San Miguel counties while maintaining a relatively moderate grade suitable for most vehicles.
The Rio Grande Southern Railroad operated through this mountain pass from 1891 until 1952, employing specialized Galloping Goose railcars designed for mountain terrain. The railroad closure marked the end of rail transportation through the region.
The pass takes its name from nearby Lizard Head Peak, a dramatic stone formation that resembles a reptilian head when viewed from certain angles.
State Highway 145 remains open year-round and offers a parking area with restrooms at the summit for visitor convenience. Winter travel requires proper vehicle preparation and awareness of snow and ice conditions on the mountain road.
The pass divides two major watersheds, creating a natural boundary where water flows either toward the Dolores River or the San Miguel River depending on which side of the summit you descend.
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