Black River Benchmark, Washington

Prominence: 458 ft, 139 m

Elevation: 490+ feet, 149+ meters

True Isolation: 2.73 mi, 4.4 km
Elevation Info:Elevation range: 490 - 492 ft
    (2-foot closed contour)
NAVD88 Elevation: 494 ft / 150 m
    (Range 494 - 496 ft)
Local or Alternate Name(s)Alternate: Skyway Hill
Peak TypeBenchmark/Trig Point
Latitude/Longitude (WGS84)47° 29' 15'' N, 122° 14' 36'' W
47.487564, -122.24343 (Dec Deg)
556993 E 5259625 N, Zone 10 (UTM)
CountryUnited States
County/Second Level RegionKing

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Other Web Sites
     Duwamish Hill at
     Black River Benchmark at

Weather and Snow
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Ascent Info

Total successful ascents logged by registered users: 35
     Show all viewable ascents/attempts (Total: 35)

Selected Trip Reports from this site:
     2010-12-25 by Eric Noel
     2012-01-23 by Craig Willis
     2015-02-11 by Marion Bauman
     2019-07-12 by Austin Smith
     2020-04-19 by Austin Smith

Nearby Peak Searches:
     Radius Search - Nearest Peaks to Black River Benchmark
     Elevation Ladder from Black River Benchmark
     Prominence Ladder from Black River Benchmark

Dynamic Map

 Black River Benchmark    Other Peaks
Click Here for a Full Screen Map
Web Map LinksPeakfinder Panorama
GeoHack Links   CalTopo   MyTopo   Bing Maps
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ProminenceKey Col Page  (Detailed prominence information)
  Clean Prominence: 458 ft/139 m
  Optimistic Prominence: 462 ft/139 m
  Line Parent: McDonald Lookout Site
  Key Col: Old Black River Channel    32 ft/10 m
IsolationIsolation Page  (Detailed isolation information)
   Distance: 2.73 mi/4.4 km
   Isolation Limit Point: 47.4567, -122.2808
Nearest Higher Neighbor in the PBC database:
    Tukwila High Point  (SW)
RangesContinent: North America
Range2: Pacific Ranges
Range3: Cascade Range
Range4: South Washington Cascades
Range5: Alpine Lakes Area
Range6: Seattle-Everett Area
Drainage Basins
Puget Sound
Strait of Juan de Fuca
Pacific Ocean
Lake Washington
Puget Sound
Strait of Juan de Fuca
Pacific Ocean
OwnershipLand: Private Land
Topo MapRenton O47122d1 1:25,000
Route #1 Paved Road
Data SourceGPS Reading or LIDAR

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