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Trip Report

Tibbett's Marsh — Sunday, May. 10, 2026

Issaquah Alps > Cougar Mountain

We hiked a loop from the Harvey Manning Trailhead to the Clay pit via Harvey Manning and Tibbets Marsh trials. Right now, spring beauty, bleeding hearts, salmon berry and other flowers line the trails. Go enjoy this abundance before King County mows it all off. And birds are singing, too.

There was one windfall near Cougar Pass. Remedial work obviously had not been completed.

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