The Amador Pines 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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8.26 inches of rain fell in two days, the most for this week of the year since records began in 1929. The next wettest, 7.35 inches, fell in 1950.
Amador Pines’s center stands about 3,720 ft above sea level. Within three miles the land runs from 2,790 ft to 4,260 ft, a difference of 1,470 ft: steep hill country. The highest named summit within 15 miles is Blue Mountain, about 6,020 ft, 14 miles southeast.
Under the town center the state geologic map shows Tertiary pyroclastic and volcanic mudflow deposits, unit 9 (Cascade Range) (andesite), from the Late Oligocene to Pleistocene, 2 to 24 million years old.
The section below crosses 3 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 4×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Andesite. Age: Late Oligocene to Pleistocene, 2 to 24 million years old. About 16 mi of the line.
Argillite, quartzite, phyllite. Age: Ordovician to Triassic, 202 to 487 million years old. About 7 mi of the line.
Granodiorite. Age: Permian to Tertiary, 2.6 to 260 million years old. About 0.6 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale.
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 Amador Pines reaches San Francisco Bay and the Pacific Ocean by way of Ashland Creek, Sutter Creek, Dry Creek, the Mokelumne, the South Mokelumne, the San Joaquin and New York Slough: about 110 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Amador Pines; river miles along the main stem, rounded.
Amador Pines has a warm-summer Mediterranean climate. Summer afternoons average 81° in July; winter nights fall to about 30° in January. A normal year brings about 105 inches of snow; with the rain, that comes to about 56 inches of water.
On November 14 Amador Pines normally reaches 52° and falls to 35°. The record high is 72°, in 1932; the record low 15°, in 1964. The most rain on this date, 5.79 in, fell in 1981.
Normals 1991–2020 and records since 1929 at Calaveras Big Trees, 19 miles southeast, 980 ft higher. NOAA, through RCC-ACIS.
