Mount Si Main Trail


Day Hike - Mount Si

Afternoon conditioning hike up Mount Si via the Roaring Creek and Mount Teneriffe trails.

  • Moderate/Strenuous
  • Moderate
  • Mileage: 9.0 mi
  • Elevation Gain: 3,300 ft

Mount Si trailhead (

Wednesday, October 18th at 5pm sharp

Rain or shine

This is an afternoon conditioning hike to help folks maintain their hard-won summer fitness.  We'll start at the Mount Si trailhead, then hop on the Roaring Creek Trail to the Mount Teneriffe Trail and head all the way up to the bottom of the Haystack (no scrambling at the summit).  From there, we'll have a short snack break and then take the Mount Si main trail all the way down to the Mount Si trailhead.

Since this is an afternoon hike, we need to be time efficient.  No need to give extensive info in your permission request; simply confirm that you can do Mount Si round trip in under 4 hours.

Headlamps are required.

Gaia GPS Route

Weather forecast


Mount Si Main Trail

Required Equipment

Required Equipment

The Ten Essentials

  • Navigation
  • Headlamp
  • Sun protection
  • First aid
  • Knife
  • Fire
  • Shelter
  • Extra food
  • Extra water
  • Extra clothes
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