The Goodyears Bar 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.
82° on Nov. 13, 1995, the hottest reading for this week of the year since 1908. Next is 75° in 1921.
Goodyears Bar’s center stands about 2,690 ft above sea level. Within three miles the land runs from 2,670 ft to 5,500 ft, a difference of 2,830 ft: mountain country. The highest named summit within 15 miles is Sierra Buttes, about 8,430 ft, 13 miles east-northeast.
Under the town center the state geologic map shows Ultramafic rocks, chiefly Mesozoic, unit 2 (Western Sierra Nevada and Klamath Mountains) (peridotite, serpentinite), from the Neoproterozoic to Early Jurassic, 175 to 1,000 million years old.
The section below crosses 6 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.
Argillite, quartzite, phyllite. Age: Ordovician to Triassic, 202 to 487 million years old. About 10 mi of the line.
Mafic-volcanic, greenstone. Age: Paleozoic to Mesozoic, 66 to 542 million years old. About 8 mi of the line.
Peridotite, serpentinite. Age: Neoproterozoic to Early Jurassic, 175 to 1,000 million years old. About 2 mi of the line.
Argillite, phyllite. Age: Permian to Jurassic, 145 to 299 million years old. About 2 mi of the line.
Granodiorite. Age: Permian to Tertiary, 2.6 to 260 million years old. About 1 mi of the line.
Schist, gneiss. Age: Paleoproterozoic to Cretaceous, 66 to 2,500 million years old. About 0.9 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 Goodyears Bar reaches San Francisco Bay and the Pacific Ocean by way of Goodyears Creek, the North Yuba, the Yuba, the Feather and the Sacramento: about 180 river miles.
Lake on the way: New Bullards Bar Reservoir.
75 miles of the trip are on the Sacramento.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Goodyears Bar; river miles along the main stem, rounded.
Goodyears Bar has a warm-summer Mediterranean climate. Summer afternoons average 89° in July; winter nights fall to about 29° in December. A normal year brings about 26 inches of snow; with the rain, that comes to about 65 inches of water.
On November 14 Goodyears Bar normally reaches 56° and falls to 33°. The record high is 79°, in 1995; the record low 21°, in 1915. The most rain on this date, 3.10 in, fell in 1952.
Normals 1991–2020 and records since 1908 at Downieville, 4 miles east-northeast, 220 ft higher. NOAA, through RCC-ACIS.