Mount Si Main Trail


Day Hike - Mount Si Main Trail

An evening conditioner up Mount Si to see the sunset

COVID-19: Learn about our most up-to-date guidance for participants and leaders on our COVID-19 Response page. All participants and leaders must agree to the COVID-19 Code of Conduct before participating in this Mountaineers activity.
  • Moderate/Strenuous
  • Challenging
  • Mileage: 8.0 mi
  • Elevation Gain: 3,150 ft
  • Pace: 2.5

We will meet at 5:30pm  at the Mount Si Trailhead ready to hike. We will do introductions and discuss group goals. 

Take Exit 32 off of I-90 and turn left (north) onto 436th Ave SE. Drive 0.5 mile  and turn left (west) onto North Bend Way nd in 0.25 mile, turn right (north) onto Mount Si Road. Continue 2.5 miles and turn left into the large trailhead parking lot (600 ft). We will meet at the trailhead sign board next to the privies. Discover Pass required.

Mount Si is an approximately 8 mile hike with 3150 feet elevation gain. We will keep a steady pace with minimal, very short stops in order to reach the top in 2 - 2.5 hours. We will go a bit past the lunch counter in order to have the best view of the sunset - barring heavy rain. Please be comfortable clambering up a bit of the rocky section that is past the lunch counter. We will not be hiking to the base of the haystack or up the haystack. Please bring a sack dinner/snack as we will stop at the top for a bit to enjoy the view.

We will be hiking back in the dark. Please make sure you have a working headlamp and that you are comfortable hiking in the dark. 


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
Trip Reports