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Summit

Grandfather Mountain

Idaho

About

Grandfather Mountain is a summit of 6,308 feet in the St. Joe Ranger District of the Idaho Panhandle National Forests, about 14 miles from the town of Fernwood, Idaho. Summer is the most comfortable time to go. Typical averages from a nearby weather station at a similar elevation show July and August highs around 70°F with only about six wet days a month, while winter highs stay near 28°F. The closest outing is the Marble Divide -Grandfather NRT trail, just 0.3 miles away. Hobo Cedar Grove Botanical is about 2 miles off, and Camp 3 offers camping roughly 5 miles away. Paddlers can head to Bussel Creek, about 5 miles from the summit.

Summit Facts

Summit elevation

6,308 ft

Elevation from USGS 3D Elevation Program terrain data (about 10 m resolution).

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Location

Grandfather Mountain

Idaho

Name and location: U.S. Geological Survey, Geographic Names Information System (GNIS). Elevation: USGS 3D Elevation Program. View the GNIS record.

Facts about this place

When to go

Best time to go: Jul–Aug. The mildest months here, with typical highs of 69–70°F and lows of 51–52°F.

Typical monthly averages (not a forecast) from the Mullan Pass Vor/Dme, ID weather station, 35 mi away. High / low in °F.

  1. Jan28° high19° low
  2. Feb28° high19° low
  3. Mar34° high22° low
  4. Apr40° high27° low
  5. May50° high36° low
  6. Jun58° high42° low
  7. Jul70° high52° low
  8. Aug69° high51° low
  9. Sep59° high44° low
  10. Oct44° high32° low
  11. Nov32° high23° low
  12. Dec27° high18° low

Source: NOAA NCEI U.S. Climate Normals 1991–2020

Where it is

Nearest town
Fernwood, Idaho · 14 mi

Source: USFS EDW boundaries; USGS GNIS populated places

Conditions

Active alerts for St. Joe Ranger District as of Oct 9, 2026:

Source: USFS forest alerts

Nearby

Source: Roamze catalog (indexable pages within 10 miles, PostGIS distance)

    Grandfather Mountain — Summit in Idaho | Roamze