Montana, Idaho & Wyoming Map 1872 Regional Print - Helena, Boise, Cheyenne

H.H. Lloyd & Co. issued this territorial map of Idaho, Montana and Wyoming around 1871-1872, published by Warner & Higgins in Chicago and printed by Frederick Bourquin in Philadelphia as part of Lloyd's Atlas of the United States, a work never issued as a standalone atlas but distributed only as a supplement bound into Warner & Beers county atlases of the period. The map documents the Northern Rockies during a period of rapid post-Civil War expansion, recording early county boundaries, mining districts, military posts and Native American reservations across all three territories. This particular state, referencing "Territories" plural in its title, is notably rare, the firm having last offered a comparable example for sale decades earlier, and it captures the region in the brief window just before Yellowstone's 1872 establishment as the country's first national park.

Helena anchors Montana as its territorial capital amid the region's mining camps, while Boise performs the same role for Idaho near its own gold and silver districts. Cheyenne sits along the completed Union Pacific transcontinental line in southern Wyoming, already established as the territory's leading town thanks to the railroad. The proposed route of the Northern Pacific Railroad is traced across Montana, not yet built but clearly anticipated, and South Pass appears as one of the region's storied mining centers alongside emigrant roads and scattered military forts. The map's hydrography of the Yellowstone Basin is recorded here in unusual detail for a commercial atlas map, just months before the area's transformation into protected parkland.

This map is a fitting gift for a family with roots in the mining or railroad booms of Montana, Idaho or Wyoming, or for a collector seeking a genuinely scarce Lloyd atlas supplement map from the years immediately preceding Yellowstone's creation. Compared to the store's De Lacy 1865 Montana map, focused solely on that territory in its earliest infancy, this Lloyd sheet offers a wider three-territory view of the Northern Rockies at a later, more developed stage. It is offered unframed in a full range of sizes, from a compact print for a study to a large-format piece for an office or den.