The Johnson Park 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.
Chance of showers
Showers likely
Chance of showers
Showers likely
Showers likely
Chance of showers
Mostly cloudy
Johnson Park’s center stands about 3,160 ft above sea level. Within three miles the land runs from 3,040 ft to 3,830 ft, a difference of 790 ft: hilly country. The highest named summit within 15 miles is Burney Mountain, about 7,830 ft, 8 miles south.
Under the town center the state geologic map shows Quaternary volcanic flow rocks, unit 1 (Cascade Volcanic Field) (andesite, basalt), from the Late Pliocene to Pleistocene, less than 3.6 million years old.
The section below crosses 4 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, basalt. Age: Late Pliocene to Pleistocene, less than 3.6 million years old. About 19 mi of the line.
Andesite, basalt. Age: Late Oligocene to Pleistocene, 2 to 24 million years old. About 2 mi of the line.
Coarse-detrital. Age: Pleistocene to Holocene, less than 2.6 million years old. About 2 mi of the line.
Sandstone, conglomerate. Age: Miocene to Pleistocene, less than 23 million years old. About 0.7 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 Johnson Park reaches San Francisco Bay and the Pacific Ocean by way of Burney Creek, the Pit and the Sacramento: about 390 river miles.
310 miles of the trip are on the Sacramento.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Johnson Park; river miles along the main stem, rounded.
