The Apple Mountain 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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78° on Nov. 11, 2006, the hottest reading for this week of the year since 1995. Next is 75° in 1999.
Apple Mountain Lake’s center stands about 910 ft above sea level. Within three miles the land runs from 450 ft to 2,040 ft, a difference of 1,590 ft: steep hill country. The highest named summit within 15 miles is Hogback Mountain, about 3,470 ft, 15 miles southwest.
Under the town center the state geologic map shows Catoctin Formation - Metabasalt, from the Neoproterozoic to Cambrian, 487 to 1,000 million years old.
The section below crosses 7 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 9×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Metabasalt. Age: Neoproterozoic to Cambrian, 487 to 1,000 million years old. About 9 mi of the line.
Quartzite, conglomerate, sandstone. Age: Cambrian, 487 to 542 million years old. About 5 mi of the line.
Dolostone, limestone. Age: Cambrian, 487 to 542 million years old. About 3 mi of the line.
Granulite. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 3 mi of the line.
Dolostone. Age: Cambrian, 487 to 542 million years old. About 2 mi of the line.
Limestone. Age: Cambrian to Ordovician, 445 to 542 million years old. About 2 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 1 smaller unit 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 Apple Mountain Lake reaches Chesapeake Bay and the Atlantic Ocean by way of the Shenandoah and the Potomac: about 220 river miles.
180 miles of the trip are on the Potomac.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Apple Mountain Lake; river miles along the main stem, rounded.
Apple Mountain Lake has a humid subtropical climate. Summer afternoons average 87° in July; winter nights fall to about 24° in January. A normal year brings about 21 inches of snow; with the rain, that comes to about 43 inches of water.
Normals 1991–2020 and records since 1995 at Front Royal, 4 miles west-southwest. NOAA, through RCC-ACIS.
