Ontario Peak

Ontario Peak is a 8,693 ft / 2,650 m mountain peak in the San Gabriel Mountains in California, United States. Based on peakery data, it ranks as the 858th highest mountain in California and the 7423rd highest mountain in the United States. The nearest peaks are Sugarloaf Peak, Bighorn Peak, Timber Mountain, Cucamonga Peak, Telegraph Peak, and Thunder Mountain. Ontario Peak belongs to the Sierra Club Hundred Peaks Section, and the LA Home Court 1000 peak lists. See the Ontario Peak map, 3D fly around, and the Ontario Peak photos to get a better sense of the mountain.

Ontario Peak SUMMIT LOG peakery first ascent by shanaynay11

61 members report climbing or hiking to the summit, most recently on Jul 26, 2015. Below are trip reports and shared pictures from their climbs.

Others who’ve summited Ontario Peak

  • df234afsef1245r
  • alyssaamaee
  • AS73
  • Earthculture22
  • marmot505
  • jg063297

Routes Used trails & approaches

72% Icehouse Canyon

14% Bighorn Peak Ridge

6% Falling Rock Canyon

2% South slope of Sugarloaf Peak.

1% Lytle Creek Middle Fork

0% Down a ridge to Sugarloaf, then down Falling Rock Cyn.


SNAPSHOTedit info


8,693 ft / 2,650 m


1,039 ft / 317 m

Height Rank Range

San Gabriel Mountains


California, United States

Summited by

see all
  • Sunday
  • df234afsef1245r
  • shanaynay11
  • JuanAlvarenga
  • rdm24
  • mcphersonm80
  • dgrutherford
  • BeerGut
  • JohnnyMar
  • SDHiker
  • Christopher
  • Nei

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