Mount Si Old Trail


Day Hike - Mount Si Old Trail

Strenuous Monday morning hike in the rain up the less crowded Old Trail. Bring rain clothes, micro-spikes, and trekking poles.

  • Strenuous
  • Challenging
  • Mileage: 7.0 mi
  • Elevation Gain: 3,300 ft
  • High Point Elevation: 4,000 ft
  • Maximum Wind: 20 kts
  • Pace: 2.5 mph

Meet at 7:30 AM at Little Si Trailhead.   The parking lot fills up quick.  The group will meet by the sign in the main parking lot.  

Take exit 32 on I-90 East for 436th Ave SE. Turn left onto 436th Ave SE, drive 0.6 miles. Turn left onto SE North Bend Way, drive 0.3 miles. Take the 1st right onto SE Mount Si Rd, drive 0.4 miles. Look for overflow parking lot on your left and main parking lot nearby with a sign marked "Little Si".

This is a steeper trail than the Main Mount Si Trail and might be muddy and slippery in some areas so please bring trekking poles and micro-spikes.  Also bring warm clothes and rain clothes as the forecast is predicting rain around noon.  Temperature at the top of mountain will be in the mid to upper 30s.   Please bring a photo of your vaccination card.


Mount Si Old Trail

Required Equipment

Required Equipment

The Ten Essentials

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