The Purgatoire River winds through the southern reaches of this landscape, carving the Picketwire Valley and supporting the small settlements of Tijeras and Madrid. Located in Las Animas County, this region is defined by a series of deep canyons, including Chinamans Canyon, Wolf Canyon, and Burro Canyon, which segment the high ground. The presence of Coal Mine Dr near the western edge and the established settlement of Cokedale to the east reflects the area's deep-rooted coal mining heritage. Genealogists and local historians can find two notable burial grounds here: the Burro Canyon Cem situated near the canyon floor and the San Juan Cem to the southwest. To the north, the community of Boncarbo sits amidst a network of county roads and drainage systems like Reilly Canyon, illustrating the dispersed residential patterns typical of this mountainous terrain.
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1891 · Spanish Peaks
USGS Topo · 1:125,000
1893 · Spanish Peaks
USGS Topo · 1:125,000
1895 · Spanish Peaks
USGS Topo · 1:125,000
1897 · Spanish Peaks
USGS Topo · 1:125,000
1900 · Spanish Peaks
USGS Topo · 1:125,000
1951 · Trinidad
USGS Topo · 1:24,000
1951 · Valdez
USGS Topo · 1:24,000
1951 · Madrid
USGS Topo · 1:24,000
1951 · Starkville
USGS Topo · 1:24,000
1954 · Trinidad
USGS Topo · 1:250,000