The Yellow Pine 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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66° on Nov. 12, 2016, the hottest reading for this week of the year since 1926. Next is 64° in 2025.
Yellow Pine’s center stands about 5,440 ft above sea level. Within three miles the land runs from 4,650 ft to 7,950 ft, a difference of 3,300 ft: mountain country. The highest named summit within 15 miles is Rainbow Peak, about 9,270 ft, 13 miles east.
Under the town center the state geologic map shows Granodiorite and two-mica granite (granodiorite, granite), from the Early Cretaceous to Late Cretaceous, 67 to 107 million years old.
The section below crosses 5 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.
Granodiorite, granite. Age: Early Cretaceous to Late Cretaceous, 67 to 107 million years old. About 17 mi of the line.
Age: Neoproterozoic to Cambrian, 487 to 1,000 million years old. About 5 mi of the line.
Gravel, sand, silt. Age: Quaternary, less than 2.6 million years old. About 0.9 mi of the line.
Dacite, andesite, rhyolite. Age: Eocene, 34 to 56 million years old. About 0.4 mi of the line.
Coarse-detrital, fine-detrital. Age: Pleistocene, less than 2.6 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.
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 Yellow Pine reaches the Pacific Ocean by way of the East Fork South Fork Salmon, the South Fork Salmon, the Salmon, the Snake and the Columbia: about 690 river miles.
Lake on the way: Lake Umatilla.
210 miles of the trip are on the Columbia.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Yellow Pine; river miles along the main stem, rounded.
Yellow Pine has a dry-summer warm-summer continental climate. Summer afternoons average 87° in July; winter nights fall to about 12° in January. About 24 inches of rain fall in a normal year.
Normals 1991–2020 and records since 1926 at Yellowpine, here, 390 ft lower. NOAA, through RCC-ACIS.
