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At Mountain & Weather Reference

AT Mountain Reference & Field Decisions

Daily GO / NO-GO Check

  1. What’s today’s summit elevation?
  2. Town temp minus (3.5°F × elevation gain in thousands)
  3. Wind forecast?
  4. Any exposure above treeline?

If wind >30 mph or ice on rock: → Delay or bail

Major AT Climbs with Start Elevation

GEORGIA

PeakStart ElevationSummitNet Gain
Springer Mountain~3,200 ft3,782 ft~580 ft
Blood Mountain~3,100 ft (Neels Gap)4,458 ft~1,350 ft

NORTH CAROLINA / TENNESSEE

PeakStart ElevationSummitNet Gain
Standing Indian Mountain~3,500 ft5,499 ft~2,000 ft
Wayah Bald~3,800 ft5,342 ft~1,540 ft
Cheoah Bald~1,700 ft5,062 ft~3,300 ft
Kuwohi (Clingmans Dome)~5,000 ft6,643 ft~1,640 ft
Snowbird Mountain ✓~2,200 ft~4,260 ft~2,060 ft

VIRGINIA

PeakStart ElevationSummitNet Gain
Mount Rogers Area~4,000 ft5,729 ft~1,700 ft
The Priest~650 ft4,063 ft~3,400 ft
Three Ridges~1,500 ft~3,970 ft~2,470 ft

MID-ATLANTIC

PeakStart ElevationSummitNet Gain
Blue Mountain (PA)~800 ft~2,300 ft~1,500 ft

NEW ENGLAND

PeakStart ElevationSummitNet Gain
Mount Greylock~1,800 ft3,491 ft~1,700 ft
Mount Moosilauke~2,000 ft4,802 ft~2,800 ft
Franconia Ridge (Mt. Lafayette)~3,000 ft5,249 ft~2,250 ft
Mount Washington~2,400 ft6,288 ft~3,900 ft

MAINE

PeakStart ElevationSummitNet Gain
Bigelow Range~1,300 ft4,145 ft~2,800 ft
Mount Katahdin~1,200 ft5,269 ft~4,000 ft

Ranked Difficulty (Reality-Based)

TIER 1 — LEGENDARY

  • Mount Washington
  • Mount Katahdin
  • The Priest

TIER 2 — MAJOR GRINDERS

  • Snowbird Mountain
  • Cheoah Bald
  • Mount Moosilauke
  • Franconia Ridge

TIER 3 — HARD BUT MANAGEABLE

  • Blood Mountain
  • Kuwohi (Clingmans Dome)
  • Bigelow Range

Weather & Elevation Rules

Temperature Rule

Temperature Lapse Rates by Condition:

  • Standard (dry air): -3.5°F per 1,000 ft gained
  • Moist air: -3.3°F per 1,000 ft gained
  • Worst-case (dry, windy): -5.5°F per 1,000 ft gained

Use worst-case for safety planning on exposed ridges and balds.

Wind Chill Guidelines

Wind SpeedFeels Like
10 mph~9°F colder
20 mph~15°F colder
30 mph~19°F colder
40+ mph~22°F+ colder

Hard Bail Conditions

  • Wind >30 mph above treeline
  • Ice on rock
  • Freezing rain
  • Visibility <100 ft
  • Rapid temperature drop (>15°F/hour)

Month-by-Month Risk Overview (NOBO)

MonthRegionConditionsRisk Level
FebruaryGA → Southern NCCold, ice risk, short daylightModerate-High
MarchSmokiesHigh elevation, severe wind chillHigh
AprilNC → VAWet, improving tempsModerate
MayCentral VAHeat + steep climbsModerate
JuneShenandoahs → PARocks, fatigueLow-Moderate
JulyNY → VTHeat, storms, mudModerate
AugustWhites (NH)Exposure, extreme weatherVery High
SeptemberMaineCold, wet rock, fatigueHigh