Backpack - Tumac Mountain & Twin Sisters Lakes Loop


Backpack - 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
  • Moderate
  • Mileage: 18.0 mi
  • Elevation Gain: 2,500 ft
  • High Point Elevation: 6,340 ft
  • Pace: 1.8 mph + 1000 ft/hr

If they allow overnight parking, carpool will meet at US Forest Service Ranger Station, 450 Roosevelt Ave E, Enumclaw, WA 98022 at 7:30am. I expect riders to compensate their driver at $0.18 mile. For this trip that would be about $25.00 for the 142 miles roundtrip from Enumclaw to the Dog Lake Trailhead.

We are planning to start at 9:00am at Dog Lake Trailhead, just east of White Pass on Hwy. 12

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. From the White Pass area we will do a loop to Twin Sisters Lakes and Tumac mountain. Expect 9 miles each day, with the day that skips Tumac Mountain having less elevation gain.

My expectations for trip participants are as follows:

(1) Follow the Leave No Trace principles. (2) Have the physical conditioning necessary for this trip. Other than the ascent up Tumac Mountain most of the route is flat or gently uphill/downhill. (3) Be comfortable with shoulder-season backpacking. This means it will be colder overnight, the ground might be wet, there might even be a bit of snow on the ground. There is also less daylight and so more time spent in the tent and/or in the dark. (4) Be respectful of all participants.

My goals for this trip are as follows:

(1) Be safe. (2) Have fun. (3) Explore the two Twin Sisters lakes and check out the view from Tumac mountain. (4) Be comfortable. Inclement weather will cancel the trip.

Things to think about when signing up for this trip:

(1) White Pass is a long drive from Seattle. (2) There could be mud or snow. (3) Hunters might be in the area. This trip falls during archery season, but not rifle season.


Tumac Mountain & Twin Sisters Lakes

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  • See full route/place details.
Required Equipment

Required Equipment

The Ten Essentials plus overnight gear which may include:

  • Tent with footprint/ground tarp
  • Stove and fuel
  • Sleeping bag
  • Sleeping pad
  • Water filter
  • Bear canister or extra stuff sack and cord designated for hanging food
  • Cooking pot/pan with plate and utensils
  • Toilet paper and shovel or blue bag to deal with waste
Trip Reports