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Summit

Muir Peak

California

About

Muir Peak is a summit of 4,687 feet in the Los Angeles Gateway Ranger District of Angeles National Forest, about 2.5 miles from Altadena, California. Spring and fall are the most comfortable times to go. Typical averages from a nearby weather station at Mt Wilson show May highs around 70°F and October highs around 72°F, while July and August average in the mid-80s. That station sits about 1,000 feet higher than the peak, so temperatures on top run a little warmer. Lone Tree Trail and One Man & Mule Trail both start within a mile. Mt. Lowe campground is about 0.9 miles away, and Idlehour campground is about 1.2 miles away.

Summit Facts

Summit elevation

4,687 ft

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

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Location

Muir Peak

California

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: Apr–Nov. The mildest months here, with typical highs of 63–85°F and lows of 42–64°F.

Typical monthly averages (not a forecast) from the Mt Wilson Cbs, CA weather station, 2.1 mi away. High / low in °F.

  1. Jan56° high38° low
  2. Feb55° high37° low
  3. Mar59° high39° low
  4. Apr63° high42° low
  5. May70° high48° low
  6. Jun79° high58° low
  7. Jul84° high64° low
  8. Aug85° high64° low
  9. Sep81° high59° low
  10. Oct72° high51° low
  11. Nov63° high43° low
  12. Dec55° high37° low

The station sits about 1,000 ft higher than this spot, so expect it to run a little warmer here.

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

Where it is

Nearest town
Altadena, California · 2.5 mi

Source: USFS EDW boundaries; USGS GNIS populated places

Conditions

Active alerts for Angeles National Forest as of Oct 9, 2026:

Source: USFS forest alerts

Nearby

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

    Muir Peak — Summit in California | Roamze