Day Hike - Tumac Mountain & Twin Sisters Lakes Loop


Day Hike - Tumac Mountain & Twin Sisters Lakes Loop

Visit the ancient cinder cone of Tumac Mountain as we tour the Tumac Plateau in fall colors north of White Pass. This is perfect habitat for Roosevelt Elk and we may hear them bugling.

  • Moderate/Strenuous
  • Challenging
  • Mileage: 13.1 mi
  • Elevation Gain: 2,500 ft
  • High Point Elevation: 6,340 ft
  • Pace: 1.8 mph + 1000 ft/hr

Deep Creek trailhead at 7:30am.

As the trailhead is deep in the William O Douglas wilderness, I recommend car camping, probably at Soda Springs campground along Bumping River road 18 on Friday night.  Sites are available on a first come, first serve basis and cannot be reserved.  Arrangements and details of the car camp will be forthcoming in the leader's email two weeks prior to the trip.

I will probably arrange an optional hike on the Naches Peak loop on Friday as we cross Chinook Pass on our way to the car camp.

This area just north of White Pass is a large plateau with a ton of small lakes, ponds and marshy meadows. It is mosquito paradise and best avoided in summer.  Other than the ascents up to Little Twin Sisters Lake and Tumac Mountain, most of the route is flat or gently uphill/downhill.  I rate the hike challenging because of the 13 mile distance to complete the loop.

I take a leisurely to moderate pace - expect a steady, slow pace on the incline from the leader. Dress in layers, as it may be cold with our early start.  In the shoulder season inclement weather, such as a day of steady rain or snow, may cancel the trip.


Tumac Mountain & Twin Sisters Lakes

  • Green Trails Goat Rocks William O Douglas Wilderness No. 303S

    Trails Illustrated Goat Rocks, Norse Peak & William O. Douglas Wilderness Areas

    Green Trails White Pass No. 303
  • See full route/place details.
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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