1968 Map of Lyons

About this map

Lyons serves as the focal point of this late-1960s survey, situated at the confluence of North St Vrain Creek and South St Vrain Creek. The landscape transitions from the developed edge of the plains into the high country of the Roosevelt National Forest, where water management infrastructure like the Button Rock Reservoir and the Longmont Reservoir dominate the mountain canyons. Evidence of local industry is widespread, with numerous quarries dotting the slopes of Steamboat Mountain and Indian Lookout Mountain. To the south, the small settlement of Altona is anchored by the Altona Grange, while an intricate network of irrigation features including the St Vrain Supply Canal and South Ledge Ditch reveals the complex plumbing required for front range agriculture and municipal growth.