The Trail 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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77° on Nov. 13, 1999, the hottest reading for this week of the year since 1970. Next is 73° in 1995.
Trail’s center stands about 1,460 ft above sea level. Within three miles the land runs from 1,400 ft to 2,950 ft, a difference of 1,550 ft: steep hill country. The highest named summit within 15 miles is Olson Mountain, about 5,060 ft, 14 miles east.
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 6×. 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, basaltic-andesite. Age: Oligocene to Miocene, 5.3 to 34 million years old. About 13 mi of the line.
Basalt, basaltic-andesite. Age: Oligocene to Miocene, 5.3 to 34 million years old. About 7 mi of the line.
Volcanic. Age: Tertiary, 2.6 to 66 million years old. About 3 mi of the line.
Sand, gravel, silt. Age: Holocene, less than 12,000 years old. About 0.7 mi of the line.
Andesite, hypabyssal-basalt, hypabyssal-basaltic-andesite. Age: Miocene, 5.3 to 23 million years old. About 0.4 mi of the line.
Gravel, boulders, clay. Age: Pleistocene to Holocene, 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 Trail reaches the Pacific Ocean by way of Trail Creek and the Rogue: about 150 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Trail; river miles along the main stem, rounded.
Trail has a warm-summer Mediterranean climate. Summer afternoons average 90° in July; winter nights fall to about 31° in January. About 33 inches of rain fall in a normal year, with about 1 inch of snow.
On November 14 Trail normally reaches 55° and falls to 34°. The record high is 73°, in 2025; the record low 11°, in 1978. The most rain on this date, 1.03 in, fell in 2024.
Normals 1991–2020 and records since 1970 at Lost Creek Dam, 7 miles east-northeast, 120 ft higher. NOAA, through RCC-ACIS.
