The Pecos River carves a winding path through this corner of San Miguel County, dictating the placement of settlements and transit corridors against the dramatic rise of Glorieta Mesa. Small communities like North San Ysidro and South San Ysidro are situated along the valley floor, while Ilfeld sits at a strategic transit point near Ilfeld Pass. The landscape is a complex network of canyons and mesas, including the prominent Gusano Mesa and the expansive Santa Fe National Forest that dominates the northern and southern reaches of the sheet.
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1889 · Las Vegas
USGS Topo · 1:125,000
1889 · Santa Fe
USGS Topo · 1:125,000
1890 · Bernal
USGS Topo · 1:125,000
1891 · Bernal
USGS Topo · 1:125,000
1891 · Las Vegas
USGS Topo · 1:125,000
1893 · Las Vegas
USGS Topo · 1:125,000
1894 · Santa Fe
USGS Topo · 1:125,000
1894 · Bernal
USGS Topo · 1:125,000
1894 · Lamy
USGS Topo · 1:125,000
1954 · Santa Fe
USGS Topo · 1:250,000