San Luis Hills rise in the northwest corner of this quadrangle, overlooking a complex network of agricultural irrigation that sustains the communities of San Acacio and Viejo San Acacio. This landscape is defined by its water management, featuring an intricate system of ditches and canals designed to divert flow from Culebra Cr. Key infrastructure such as the San Acacio Stock Ditch Number 1, San Acacio Stock Ditch Number 2, and the Cerritos Canal distribute water across the high desert plains. Toward the southeast, the Sanchez Stabilizing Reservoir and Mesa Ditch further illustrate the region's reliance on engineering to manage the arid environment. For genealogists, the Old Town Cem located near the original settlement site provides a specific point of interest for tracing early families in this part of Costilla County.
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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
1965 · Lasauses
USGS Topo · 1:24,000
1965 · Blanca SE
USGS Topo · 1:24,000
1967 · San Luis
USGS Topo · 1:24,000
1967 · Fort Garland SW
USGS Topo · 1:24,000
1967 · Sky Valley Ranch
USGS Topo · 1:24,000
1967 · Mesito Reservoir
USGS Topo · 1:24,000