Source Lake


Backcountry Ski/Snowboard - Source Lake

This is an instructional tour for Foothills AIARE instructors/assistants only. We will combine a moderate tour with either beacon practice or snow pit profiles somewhere along the route.

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
  • Moderate
  • Mileage: 5.0 mi
  • Elevation Gain: 1,000 ft

We will meet at the Source Lake TH at 8:00 am for our AM meeting. Fill out your field book and an AM meeting form prior. We will proceed for a tour in the Alpental drainage and then go through an instructional activity TBD by participants. Parking is in the lowest Alpental lot at the "Welcome" sign.

Depending on the instructional activity, you may need snow science tools in addition to the required 10 essentials and beacon/shovel/probe.

Leaders, if you're going to a "general" area to ski, please add specific details about the route you have planned and its difficulty. View the Backcountry Skiing Activity Overview page for ski difficulty ratings.


Source Lake

  • Green Trails Snoqualmie Pass No. 207

    USGS Snoqualmie Pass

    Green Trails Snoqualmie Pass Gateway No. 207S
  • See full route/place details.
Required Equipment

Required Equipment

  • The Ten Essentials
  • Boots, skis/splitboard, poles
  • Climbing skins (or other method to travel uphill on snow)
  • Avalanche shovel (metal blade)
  • Avalanche beacon
  • Avalanche probe
  • AIARE field book
  • AM meeting form
Trip Reports