Colorado Mines Peak and Blue Lake Trail Professional Guide
Detailed Trail Description from our Guidebook
"Berthoud Pass, elevation 11,300 feet, was discovered in 1861, relatively late in the mapping and exploration of these mountains.
The man who discovered this deep notch in the sky-high ridge was Swiss-born engineer Edward Louis Berthoud. His plan was to build a road across the ridge, but he was unable to raise sufficient money. Thus, his idea languished until the road to the north across Rollins Pass was completed in 1873. The Berthoud Pass road was built and paid for by the bustling and silverrich town of Georgetown that lies to the south."