
San Isabel National Forest dominates the western half of this quadrangle, where the high-altitude hydrology of the Sangre de Cristo foothills begins its descent into the Huerfano valley. The landscape is defined by a dense network of drainage systems, including N Apache Cr, Apache Falls, and the Chitwood Br S Apache Cr. These waterways transition from steep mountain terrain into the broader desert arroyos typical of southern Colorado, such as Greasewood Arroyo and Pope Arroyo.
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1889 · Huerfano Park
USGS Topo · 1:125,000
1891 · Walsenburg
USGS Topo · 1:125,000
1892 · Huerfano Park
USGS Topo · 1:125,000
1894 · Walsenburg
USGS Topo · 1:125,000
1897 · Walsenburg
USGS Topo · 1:125,000
1900 · Walsenburg
USGS Topo · 1:125,000
1954 · Trinidad
USGS Topo · 1:250,000
1955 · Trinidad
USGS Topo · 1:250,000
1958 · Trinidad
USGS Topo · 1:250,000
1959 · Trinidad
USGS Topo · 1:250,000