1958 Map of East Portal

About this map

The Continental Divide serves as the backbone of this high-altitude survey, marking the intersection of the Arapaho National Forest and Roosevelt National Forest. The map documents a critical point in Colorado's transportation history, centered on the East Portal of the Moffat Tunnel. While the Denver and Rio Grande Western line pierces through the bedrock, remnants of older engineering are visible nearby. The serpentine Old Railroad Grade winds through the topography, passing the distinctive Riflesight Notch.