Mount Si

Mount Si is a 4,167 ft / 1,270 m mountain peak in the Cascades in Washington, United States. Based on peakery data, it ranks as the 1794th highest mountain in Washington and the 30910th highest mountain in the United States. The nearest peaks are Blowdown Mountain, Crater Lake Mountain, Little Si, Dixie Peak, West Teneriffe, and Mount Teneriffe. Mount Si belongs to the Seattle I90 Shuffle Peak Challenge peak list. See the Mount Si map, 3D fly around, and the Mt. Si photos to get a better sense of the mountain.

Mount Si SUMMIT LOG peakery first ascent by GeoBrown

165 members report climbing or hiking to the summit, most recently on Jan 1, 2017. 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 Mount Si Trail (new trail), Mount Si Trail and Old Si Trail.

Others who’ve summited Mount Si

  • chris
  • jonatron
  • OspreyGuy
  • somaalathia27
  • lilnova
  • jeggert
  • travelhiker
  • bradgreene30
  • joelhowitt
  • webbetron
  • dsbmtn
  • MangyMarmot
  • NspctrGdgt
  • jlsmithlv
  • twoamuse
  • MartinAyling
  • CHillNews
  • KristaC
  • rebecca1
  • RichHamilton
  • brian
  • sven
  • rbaumchen
  • Sarah-Heller
  • mtngoat
  • JF
  • Baldo100
  • BrendanCleary
  • Trystan
See more

Routes Used trails & approaches

40% Mount Si Trail (new trail)

34% Mount Si Trail

20% Old Si Trail

4% connector trail to Mount Teneriffe Road-Trail


SNAPSHOTedit info


4,167 ft / 1,270 m


247 ft / 75 m

Height Rank

#1794 in Washington

#30910 in United States




Washington, United States

Summited by

see all
  • scott
  • chris
  • GeoBrown
  • jonatron
  • davidcrerar
  • OspreyGuy
  • somaalathia27
  • lilnova
  • jeggert
  • travelhiker
  • platypii
  • bradgreene30

3d Fly AroundShow Bigger »

Nearest peaks see on map »