The Regina plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.
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68° on Nov. 16, 2025, the hottest reading for this week of the year since 1912. Next is 67° in 1980.
Regina’s center stands about 7,470 ft above sea level. Within three miles the land runs from 7,250 ft to 8,170 ft, a difference of 920 ft: steep hill country. The highest named summit within 15 miles is Nacimiento Peak, about 9,810 ft, 12 miles south-southeast.
Under the town center the state geologic map shows San Jose Formation (claystone, sandstone), from the Eocene, 34 to 56 million years old.
The section below crosses 8 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 6×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Claystone, sandstone. Age: Eocene, 34 to 56 million years old. About 14 mi of the line.
Granodiorite, diorite, gabbro. Age: Paleoproterozoic, 1.7 to 1.8 billion years old. About 8 mi of the line.
Shale. Age: Late Cretaceous, 72 to 100 million years old. About 0.6 mi of the line.
Conglomerate-sandstone, coarse-detrital, fine-detrital. Age: Late Oligocene to Late Miocene, 5.3 to 28 million years old. About 0.4 mi of the line.
Sandstone, shale. Age: Late Cretaceous, 72 to 84 million years old. About 0.3 mi of the line.
Mudstone, shale. Age: Late Cretaceous, 72 to 84 million years old. About 0.3 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 2 smaller units along the line are not listed.
Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR; rock from the USGS State Geologic Map Compilation.
A raindrop that lands in Regina reaches the Gulf of America by way of San Jose Creek, the Arroyo San Jose, the Rio Puerco and the Rio Grande: about 1,710 river miles.
Lakes on the way: Paz Ramirez Lake, Amistad Reservoir, Elephant Butte Reservoir and Caballo Reservoir.
760 miles of the trip are on the Rio Grande.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Regina; river miles along the main stem, rounded.
Regina has a cold semi-arid climate. Summer afternoons average 86° in July; winter nights fall to about 13° in January. A normal year brings about 29 inches of snow; with the rain, that comes to about 12 inches of water.
Normals 1991–2020 and records since 1912 at Johnson Ranch, 17 miles south-southwest, 270 ft lower. NOAA, through RCC-ACIS.
