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 862nd highest mountain in California and the 7436th 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

62 members report climbing or hiking to the summit, most recently on Aug 22, 2015. Below are trip reports and shared pictures from their climbs. Based on the summit log, the most popular climbing routes and hiking trails to the summit are Icehouse Canyon, Bighorn Peak Ridge and Falling Rock Canyon.

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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