Mount Washington Height in Meters: Core Fact
Mount Washington stands 1,916 meters (6,288 feet) above sea level, making it the highest peak in the U.S. Northeast and the most prominent peak in the northeastern United States. This elevation is based on modern geodetic surveys and is maintained by official topographic databases. The summit sits in the White Mountains of New Hampshire, within the White Mountain National Forest and Appalachian Trail. Its prominence and elevation contribute to extreme weather and scientific importance. Below is a concise reference table for elevation and related attributes.
| Attribute | Verified Detail | Source Type |
|---|---|---|
| Summit Elevation | 1,916 meters (6,288 feet) | Geodetic survey / NGVD 29 / NAVD 88 |
| Prominence | 1,878 meters (6,162 feet) | Topographic prominence calculation |
| Isolation | 1,218 kilometers to Mount Washington, Arctic sea peak | Topographic isolation metric |
| Location | Coos County, New Hampshire, USA | USGS GNIS |
| Survey Epoch | Benchmarks established in 19th–20th centuries, rechecked via GPS in modern campaigns | NOAA / NGS |
Why Accurate Elevation Matters for Science and Public Use
Height figures underpin climate research, weather modeling, and hazard assessments. Precise elevation enables consistent comparisons with other peaks, hydrology studies, and aviation safety. For the public, accurate height informs trail planning, acclimatization expectations, and understanding of exposure and risk. Professional surveys rarely change by more than a few centimeters, so the accepted elevation remains highly stable.
Geographic and Geodetic Context
How We Measure Mountain Height
Elevation can be expressed relative to mean sea level (standard geodetic height) or to the geoid surface. Common datums include NGVD 29 (older) and NAVD 88 (current U.S. standard), with ellipsoid heights derived from GPS referenced to WGS 84. Modern campaigns combine GNSS, gravity data, and leveling to refine values. Heights can differ slightly depending on the reference surface and measurement technique.
Mount Washington Among Major Peaks
- Appalachian highpoint: Mount Washington is the highest in the northeastern U.S. and the most prominent in the region.
- World context: Far below ultra-prominent summits, but notable regionally for its weather extremes.
- Rankings: While not top-tier by global elevation, its prominence and isolation are significant for the Northeast.
Practical Implications of the Summit Elevation
Height influences temperature, precipitation phase, and wind exposure. The summit is famous for extreme conditions, with hurricane-force winds recorded frequently. Accurate elevation underpins weather station calibration, research instrumentation deployment, and safety advisories for visitors. Whether you’re planning a hike, a research campaign, or a scenic drive, understanding the true elevation helps contextualize the environment.
Historical Measurement Milestones
Early Surveys and Benchmarks
Height estimates date back to early topographic surveys, with benchmarks placed in the 19th century by agencies that became the U.S. Geological Survey. Early methods used spirit leveling and triangulation; later campaigns incorporated electronic distance measurement and photogrammetry. Reoccupations in the GPS era have confirmed stability of the summit position and elevation within expected tolerances.
Modern Reassessments
Recent geodetic campaigns refine ellipsoid and orthometric heights, ensuring consistency across datasets used by scientists and agencies. While the core elevation remains 1,916 meters, accompanying metadata—accuracy, epoch, and datum—are essential for precise applications.
Visitor Guidance and Safety Considerations
Elevation is a key factor in planning for weather exposure, hydration, and pacing. The summit environment can resemble alpine conditions even in summer, with sudden temperature drops and high winds. Accurate height expectations help hikers prepare appropriate gear and time their attempts. Always check current conditions, use reliable maps, and follow guidance from local authorities.