The Trout Lake 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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69° on Nov. 14, 2025, the hottest reading for this week of the year since 1909. Next is 63° in 1969.
Trout Lake’s center stands about 1,910 ft above sea level. Within three miles the land runs from 1,730 ft to 2,970 ft, a difference of 1,240 ft: steep hill country. The highest named summit within 15 miles is Mount Adams, about 12,260 ft, 14 miles north.
Under the town center the state geologic map shows Pleistocene-Recent volcanic rocks (basalt), from the Early Pliocene to Holocene, less than 5.3 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.
Basalt. Age: Early Pliocene to Holocene, less than 5.3 million years old. About 12 mi of the line.
Basalt. Age: Late Oligocene to Early Pliocene, 3.6 to 28 million years old. About 10 mi of the line.
Silt, sand. Age: Holocene, less than 12,000 years old. About 1 mi of the line.
Conglomerate. Age: Late Eocene to Early Miocene, 16 to 38 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 Trout Lake reaches the Pacific Ocean by way of Trout Lake Creek, the White Salmon and the Columbia: about 200 river miles.
160 miles of the trip are on the Columbia.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Trout Lake; river miles along the main stem, rounded.
Trout Lake has a cold desert climate. Summer afternoons average 84° in July; winter nights fall to about 25° in December. Barely 0.0 inches of rain fall in a normal year.
On November 14 Trout Lake normally reaches 46° and falls to 30°. The record high is 69°, in 2025; the record low 3°, in 1985. The most rain on this date, 1.95 in, fell in 2001.
Normals 1991–2020 and records since 1909 at Mount Adams Rs, here. NOAA, through RCC-ACIS.
