Mount Si Loop is a 7 mile moderately trafficked loop trail located near North Bend, Washington that offers the chance to see wildlife and is rated as difficult. The trail is primarily used for hiking and running and is accessible year-round. Dogs are also able to use this trail but must be kept on leash.

Length7.0 miElevation gain3,366 ftRoute typeLoop
Dogs on leashHikingRunningForestViewsWildlife
Description
Waypoints (4)

This loop combines the official new Mount Si Trail with the Old Mount Si Trail, which is now rarely used by hikers, with the Douglas Fir Trail (also rarely used but in perfect condition) as the connector to the Boulder Garden Loop trail. The Loop starts and ends at the Little Si Trailhead, so it merges with Little Si Trail at the lower part. Please note that the trail is often covered in snow and difficult to trek through much of the year. Discover Pass is required.

Weather
UV Index
Daylight
Reviews (69)
Photos (1,719)
Recordings (65)
Completed (311)
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Hami Bahadori
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Hiking
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Rajachitra Senthivel
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Hiking
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Andrea Casas-Beaux
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Hiking

The mt si trail is a clusterfuck & 50% of people weren’t wearing face coverings BUT the Boulder garden loop portion was incredibly tranquil.

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Joy Wang
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Hiking
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Ben Brannan
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Hiking

Definitely not for the faint of heart! I’d recommend doing this loop in reverse as ascending by the old trail was a killer. I’d advise bringing cleats for the top as there was some compacted snow and ice at the top, although I survived without them

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Ankit Shah
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HikingGreat!
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Michele vanderzanden
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Hiking
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Eric Middleton
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Hiking
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Lynn Ly
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Hiking

I forgot to turn off the recording before driving away lol. I had to cut the actual summit and just went from Old Si to new Mt Si trail down the rest of the way with the trail map. Nice day!

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Jane Petoskey
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Hiking

The loop is a great alternative to the busier parts of this trail. Recommend! Only a 4 since the view is alright at the top.

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Victoria Acosta
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HikingGreat!
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Ivy Tian
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HikingBugs
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Donald Tye
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HikingMuddyRocky
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Tim Schmidt
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Hiking

great hike, snow on top

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Kristen Szogas
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Hiking

If you want to see the view at the top, I’d recommend micro spikes and/or poles. The hike was super hot and I was dressed for snow, so I sweat wayyy too much. The way down had a lot of people playing music and dogs off leash, so not exactly my version of “getting away”

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Ben Tryon
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HikingIcyMuddyRockyScrambleSnow
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Justin Süß
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HikingIcyMuddySnow

Awesome hike today! You definitely need spikes and poles for the top - it’s snowy up there.. you will experience at least 2 seasons of weather so wear layers accordingly!

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Robert Froehlich
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HikingBlowdownMuddySnow

Today was a beautiful day to hike this trail. Seems like everyone got that message. Lower parts of the trail is generally muddy, but nothing too bad. Towards the top there is hard-pack snow that requires either poles or traction aids. View was awesome, and the weather held. As for this loop. The climb is consistent, and steep. Descending the new trail made for a quick exit off the mountain.

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Taz Turner-Imajo
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HikingRockyScramble

Started at Little Si trailhead and ended at Mt Si Trailhead. The old trail is constant uphill and the rock climb to the summit is quite precarious but the views and the rewarding feeling make this hike well worth it

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Curtis Keller
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Hiking

Amazing loop! The normal Si trail is about 3.5 miles to the first rocky area at the top. I found the Old Si trail to be 2.7 miles to the first rocky area, so its VERY steep. But a well maintained trail and easy to follow. And the Douglas fit trail is plush and very runable - wide, soft, straight. Perfect for high speed descent. For someone who wants something different with Mount Si, I highly recommend this loop!

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