Mount Si Main Trail


Day Hike - Mount Si Main Trail

Mount Si Time Trial for Kosman/Nelson SIG

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.
  • Challenging
  • Mileage: 8.0 mi
  • Elevation Gain: 3,150 ft

7:00am Northwest corner, 1st floor of 2 story Issaquah Transit center P&R.

To get to the transit center, participants are encouraged to schedule their own carpools. This site can help:

This hike is open to students in the Basic Climbing class needing a time trail up Mt. Si with preference for members of the Nelson/Kosman SIG.

For this time trial, you must take the Mount Si new trail carrying a pack with 15% of your body weight and get to the boulders in under two hours.


Mount Si Main Trail

Required Equipment

Required Equipment

Pack with appropriate weight, suitable food, water, clothing.

Microspikes may be advisable depending on weather and conditions.

The Ten Essentials

  1. Navigation
  2. Sun protection
  3. Insulation (extra clothing)
  4. Illumination
  5. First aid supplies
  6. Fire
  7. Repair kit and tools, including knife
  8. Nutrition (extra food)
  9. Hydration (extra water)
  10. Emergency shelter
Trip Reports