
The town of Lyons serves as the gateway to the foothills in this modern survey, where the N Saint Vrain Cr and S Saint Vrain Cr converge. The landscape is defined by its complex water management and high-relief terrain, featuring extensive irrigation works like the Table Mountain Ditch and Highland Ditch alongside significant impoundments such as Button Rock Reservoir and Longmont Reservoir. A network of trails including the Sleepy Lion Trl and Button Rock Trl highlights the area's transition into the Roosevelt National Forest. Geologic and historical markers are scattered throughout the peaks, from the Golden Age site in the southwest near Fairview Peak to the prominent heights of Steamboat Mtn and Coffintop Mtn. The settlement of Altona sits near the southern edge, connected to the local water systems by the Lake Ditch and Crocker Ditch.
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This is the sole edition of this map. No revisions or reprints were ever made.