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    Lost Lake Trail

    This reflects the 10Adventures difficulty rating for each route. We aim to keep ratings consistent across regions.
    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.
    This reflects the return distance of this route as measured by the GPS file.
    16.7 km
    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.
    632 m
    User Ratings
    These ratings are completed by users who have completed this trail and not subject to reviews by 10Adventures.
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    Directions to Trailhead
    Lost Lake Trail

    Lost Lake Trail is a moderately trafficked out-and-back trail in Mount Baker-Snoqualmie National Forest that is rated as moderate. This hike might be longer, but the elevation gain is gradual, making it suitable for intermediate hikers or adventurous children. This trail is popular with equestrians, so remember to give horses the right of way. Bug spray is also essential for this hike.

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    Route Description for Lost Lake Trail

    Lost Lake is a wonderful destination, and this trail sees more and more traffic every year as hikers discover its charm. The forest before the lake is recovering from a fire in past years, but a carpet of wildflowers covers this regrowing area in the middle of summer. Watch for horses (and mosquitoes) on this trail.

    The hike begins at the end of the road. Head straight onto Greenwater Lakes Trail. There are some crossings over Meadow Creek, and some of the bridges are better than others. Take your time and be careful if they seem less sturdy.

    You’ll hug the creek until Greenwater Lakes, a nice place to catch your breath. Continue past the lake and the irregularly-shaped unnamed body of water just past it, curving south to cross the stream again. You’ll pass Lost Creek Backpacking, where backpackers may be setting up their tents.

    Follow Lost Creek, staying right onto Lost Lake Trail when the trail forks. If you cross the stream shortly after the fork you’ve gone the wrong way. The trail eventually passes little Quinn Lake, then makes the final approach to Lost Lake, passing another backpacking site.

    The trail continues past the lake to Noble Knob, but you’ll want to turn around here and retrace your steps if Lost Lake is your final destination.

    Getting to the Lost Lake Trail Trailhead

    The trailhead for the Lost Lake Trail is at the end of National Forest Development Road 7033 off NF 70.

    Route Information

    • Backcountry Campground

      Lost Creek Backpacking Site, Lost Lake Backpacking Site

    • When to do


    • Pets allowed

      Yes - On Leash

    • Family friendly

      Older Children only

    • Route Signage


    • Crowd Levels


    • Route Type

      Out and back

    Lost Lake Trail Elevation Graph

    Weather Forecast

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    Lost Lake Trail Reviews

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