2013 Map of East Portal

About this map

Moffat Tunnel and the historical Moffat Road anchor this survey of the high mountain divide where Boulder, Grand, and Gilpin counties meet. The landscape is defined by the engineering legacy of the railroad, from the eastern entrance at East Portal to the winding ascent toward Rollins Pass. Significant transit and water infrastructure is visible, including the Denver Water Board Rd and an aqueduct near Devils Thumb Park. The rugged terrain is dotted with high-altitude water bodies like Jasper Lake and Yankee Doodle Lake, situated within the managed lands of the Arapaho National Forest and Roosevelt National Forest. Historic surveying points and mountaineering landmarks, such as Mount Jasper and the Needle Eye Tunnel, highlight the era's focus on maintaining access through the Continental Divide.