Sunday Trail Run: Mount Si


Details
Time for an old classic! Sunday away run is returning to Mount Si. Get ready to look at some waterfalls! Maybe scramble a bit! Cool views!
This is a 10-mile loop with a shortcut option for a 6-mile waterfall-only loop.
King County Metro runs the Trailhead Direct service from downtown Seattle to the trailhead, so this is easily accessible without a car. If you do drive, a Discover Pass is required to park at the trailhead. If you'd like to carpool, post in the chat! I will gladly give a lift back to anyone who took the bus up.
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Sunday Trail Runs are a TWICE monthly series. We run at home (Discovery Park / Seven Hills Running Shop on 1st Sundays) and away (rotating series of scenic trails on 3rd Sundays)!

Every 3rd Sunday of the month until January 19, 2026
Sunday Trail Run: Mount Si