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Hikes/United States/Washington State/Mount Baker-Snoqualmie National Forest
Difficulty
This reflects the 10Adventures difficulty rating for each route. We aim to keep ratings consistent across regions.
Hard
Elevation
This reflects the total elevation gained throughout this route as measured by the GPS file. This includes all ascents and descents, and is higher than what is quoted in most route guides, which simply measure the distance between the starting-point and high-point of the route.
611 m
Distance
This reflects the return distance of this route as measured by the GPS file.
11.4 km
Duration
This reflects the estimated time the majority of users will take on this trail. If you are slower, add time to the top-end figure. If you are fast, then you may complete this route faster than this time range.
3.5-5h
User Ratings
These ratings are completed by users who have completed this trail and not subject to reviews by 10Adventures.
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Twin Sisters Trail and Tumac Mountain

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Table of contents

The hike along Twin Sisters Trail to Tumac mountain is a beautiful outing, traversing 7.1mi with 2005ft of elevation gain. This hike is often used as a short backpacking trip, but you can easily complete it in a morning. The climb up Tumac doesn’t pose any special challenges, but be aware: the mosquitoes in this area are absolutely relentless, to the point where we recommend hiking this trail after the first frost if possible. Otherwise, nets and high-potency spray are essential.

Route Description for Twin Sisters Trail and Tumac Mountain

Hike to shimmering aqua lakes and then ascend Tumac Mountain for a bird’s-eye view on this great hike. Twin Sisters Trail and Tumac Mountain can be a fabulous half-day hike, or you can settle in at the campgrounds for a night.

Excellent bug protection is essential on this trail in the midsummer or you may get eaten alive!

Begin by heading south out of Deep Creek Campground, hiking through a couple of wide switchbacks to crest the ridge. Hiking above the creek on the mountainside, it's not too far before you reach the lakes. While the trail skirts one of the shores, there is a trail between them if you want to check out the larger of the two lakes to the west.

Keep heading roughly south past the lake, keeping right where the Sand Ridge Trail intersects. The trail is fairly level until you reach the base of Tumac. The trail up is very straightforward. From the summit, you’ll simply retrace your steps back to the trailhead.

Getting to the Twin Sisters Trail and Tumac Mountain Trailhead

The trailhead for the Twin Sisters Trail and Tumac Mountain is at Deep Creek Campground.

Route Information

  • Backcountry Campground:

    Deep Creek Campground, Twin Sisters Lake

  • When to do:

    July-October

  • Pets allowed:

    Yes - On Leash

  • Family friendly:

    Older Children only

  • Route Signage:

    Average

  • Crowd Levels:

    Moderate

  • Route Type:

    Out and back

Twin Sisters Trail and Tumac Mountain Elevation Graph

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