The Mapleton 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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Partly cloudy
Chance of showers
3.80 inches of rain fell in two days, the most for this week of the year since records began in 1971. The next wettest, 3.19 inches, fell in 2017.
Mapleton’s center stands about 330 ft above sea level. Within three miles the land runs from 10 ft to 1,480 ft, a difference of 1,470 ft: steep hill country. The highest named summit within 15 miles is Roman Nose Mountain, about 2,840 ft, 10 miles southeast.
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 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.
Sandstone. Age: Middle Eocene, 38 to 48 million years old. About 21 mi of the line.
Gabbro. Age: Oligocene, 23 to 34 million years old. About 1 mi of the line.
Gravel, boulders, clay. Age: Pleistocene to Holocene, less than 2.6 million years old. About 0.7 mi of the line.
Sand, gravel, silt. Age: Holocene, less than 12,000 years old. About 0.5 mi of the line.
Basalt. Age: Late Eocene, 34 to 38 million years old. About 0.5 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 Mapleton reaches the Pacific Ocean by way of the Siuslaw: about 20 river miles.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Mapleton; river miles along the main stem, rounded.
Mapleton has a warm-summer Mediterranean climate. Summer afternoons average 67° in July; winter nights fall to about 38° in February. About 68 inches of rain fall in a normal year.
On November 14 Mapleton normally reaches 53° and falls to 42°. The record high is 67°, in 1999; the record low 26°, in 1978. The most rain on this date, 2.00 in, fell in 1973.
Normals 1991–2020 and records since 1971 at Honeyman State Park, 14 miles west-southwest, 220 ft lower. NOAA, through RCC-ACIS.
