The Prineville Lake Acres 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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−19° on Nov. 16, 2014, the coldest reading for this week of the year since 1948. Next is −14° in 1955.
Prineville Lake Acres’s center stands about 3,830 ft above sea level. Within three miles the land runs from 2,990 ft to 4,340 ft, a difference of 1,350 ft: steep hill country. The highest named summit within 15 miles is West Butte, about 5,840 ft, 15 miles south-southwest.
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 8×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Age: Pliocene to Pleistocene, less than 5.3 million years old. About 12 mi of the line.
Basalt, andesite. Age: Miocene to Pleistocene, less than 23 million years old. About 4 mi of the line.
Rhyolite. Age: Eocene to Early Oligocene, 28 to 56 million years old. About 3 mi of the line.
Basalt, andesite. Age: Miocene, 5.3 to 23 million years old. About 2 mi of the line.
Sandstone-mudstone. Age: Late Eocene to Early Miocene, 16 to 38 million years old. About 1 mi of the line.
Coarse-detrital. Age: Pleistocene to Holocene, less than 2.6 million years old. About 0.4 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 Prineville Lake Acres reaches the Pacific Ocean by way of Dry Creek, the Crooked River, the Deschutes and the Columbia: about 370 river miles.
Lake on the way: Lake Billy Chinook.
200 miles of the trip are on the Columbia.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Prineville Lake Acres; river miles along the main stem, rounded.
Prineville Lake Acres has a cold semi-arid climate. Summer afternoons average 87° in July; winter nights fall to about 23° in December. About 8 inches of rain fall in a normal year.
On November 14 Prineville Lake Acres normally reaches 51° and falls to 28°. The record high is 74°, in 1999; the record low −7°, in 1955. The most rain on this date, 0.67 in, fell in 2014.
Normals 1991–2020 and records since 1948 at Redmond Airport, 18 miles west-northwest, 780 ft lower. NOAA, through RCC-ACIS.
