Join Free
1958 Map of East Portal, 1973 Print
Loading...
Loading map...

1958 Map of East Portal

USGS Topo · Published 1973

About this map

The Continental Divide defines the spine of this high-altitude landscape, separating the drainage of Hamilton Creek and Cabin Creek to the west from the South Fork Boulder Creek to the east. At the center of the sheet, the Rollins Pass (Site) marks a critical historical crossing point where the Boulder Wagon Road met early rail infrastructure. By the late 1950s, the engineering marvel of the Moffat Tunnel had transformed the region's transport, with the East Portal serving as a focal point for the Denver and Rio Grande Western railroad operations. The map details the intricate path of the Corona Trail and the dramatic looping rail alignment at Riflesight Notch, reflecting a period when remote mountain passes were being actively studied at sites like the Corona Range Study Plot. High-basin features such as Skyscraper Reservoir and Yankee Doodle Lake illustrate the management of alpine water resources across the Arapaho National Forest and Roosevelt National Forest.

Find a feature on this map

62 named features on this map. Tap any name to fly to it.

Don’t see what you’re looking for? This feature index may not catch every label — zoom into the map to look around manually.

Map Details

Date Portrayed1958
Date Published1973
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions21.6 x 27.2 inches

Editions of this 1958 East Portal Map

Historical Maps of Diamond Lake Campground Through Time

181 maps found

Featured Locations

Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain