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Copyright © Dan A. Nelson/The Mountaineers Books Talus Loop
If you want to experience the ever-popular Mount Si without the thigh-burning workout of going to the top, follow the Talus Loop Trail instead and find old-growth and old second-growth forests on the flanks of this popular mountain.
Leaving the trailhead, you'll climb moderately, weaving through the forests as the trail angles up the southern flank of Mount Si. At about 0.8 mile out, the trail forks. The main trail goes left, and so should you (the right is your return route). Over the next mile you'll climb steeply, first on a long traverse, then through some gentle turns. The route here pierces cool, dark forests, bringing you wonderful relief from summer heat, and decent protection from the driving winter rains. A small rest bench awaits you at 1.4 miles, then at 1.8 miles the trail splits again at Snag Flat Interpretive Area. The main Mount Si summit trail continues north, climbing steeply past this 2120-foot junction. Head right instead to explore the wonderfully diverse ecosystem on Snag Flat. The path heads east, crossing a small creek basin, then contours around a long forested slope. A few more creeks are crossed before the trail turns back to the west just before dropping into the Roaring Creek valley. After walking a total of 3 miles, you'll be back at the first trail junction, where you'll turn right and descend back to the trailhead.
Driving Directions:
From Seattle drive east on I-90 to exit 32 (436th Avenue SE). Turn left (north) over the freeway and drive 0.5 mile to North Bend Way. Turn left (west), and in 0.25 mile turn right (north) on Mount Si Road. The large trailhead parking lot is on the left, 2.5 miles down the road. Recent Trip Reports
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Talus Loop
— Mar 03, 2012
— VinceHikes
Day hike
Issues:
Road to trailhead inaccessible
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Trailhead (Mt Si) is still closed....
Trailhead (Mt Si) is still closed.
Day hike
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A 14-mile hike with two summit destinations joined in a loop trail. Snow coverage for Mt. Si and Mt...
A 14-mile hike with two summit destinations joined in a loop trail. Snow coverage for Mt. Si and Mt. Teneriffe currently is everything above 3000’ elevation.
I took the regular Mt. Si trail up to the haystack. Needed to put on Katoolah spikes at about 3000 as the trail was hard pack snow and ice from there to the top. Very windy at the for the last mile up and at the top with gusts hitting 35 mph or more. One brave soul had climbed to the top of the haystack and reported when he came back that the wind was "extreme." I took his word for it. After a short rest at the bench at the haystack, I took the ridge connector trail across towards Teneriffe Road. It was a few feet deep with snow, but there had been enough traffic to compress it so I didn’t need snowshoes. Once at the road junction, I turned left and followed the snow trail up the road that was broke in already and eventually got to the road-end where the ridge trail to the summit of Teneriffe starts. Following the ridge trail, it is a steep climb, but the snow was solid enough to use the previous tracks for steps. It was also ice crusted under the tree cover. Wind was again considerable as you headed farther up the ridge. The last push to the top is even steeper and the wind was even fiercer. At 4700’ elevation I turned back due to sunset approaching and the wind was bitterly cold. I wasn’t prepared for the final open ice/snow scramble at the summit and decided I’d come back another time to sit on top. The one place I didn't want to be after dark was on the upper ridge trail on Teneriffe. The trail back was quicker and easier, but the wind was still blowing and branches were occasionally falling. Once on the Teneriffe road I followed it all the way down, past the ridge connector trail with Si, to about 1700’. It was totally dark by now and navigation was by headlamp. Snow ended on the road at 2800’ leaving about 1100’ to descend on the “not-too-pleasant” rocky road surface. There were a few blowdowns across the road, but all could be passed around, under, or through. At 1700’ I found the connector user trail across Roaring creek (just a step across stream currently) and then connected with the Talus loop trail. Took the Talus Loop lower half trail back to the regular Si trail with no trouble. All blowdowns were cut out and nothing blocking. About 14 miles altogether with a few side trips here and there. Total hiking time was 8 hours 11 minutes. Total gross elevation with the ups and downs and snow cover came in at 5600’ if my Suunto altimeter was accurate. Start early enough to get off the final Teneriffe ridge before darkness sets in. There is no real trail and the tree cover is heavy with sharp drop offs on both sides if you wander off route too far. Bring a headlamp as it is may be dark by time you get back even if you start at 8 or 9 am this time of year. Poles and traction needed. Snowshoes if we get more snow. Ice ax only needed for the final summit block. Best part: you are likely to be the only person on the trail after you leave the Haystack at Mt. Si. Most challenging part: distance and elevation gain. Day hike
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Only about 10 - 12 vehicles @ the parking lot when I arrived around 10:15 on a Friday. Even though ...
Only about 10 - 12 vehicles @ the parking lot when I arrived around 10:15 on a Friday. Even though the weather forecast was iffy, I ended up hiking in sunshine most of the day. I decided to add the Talus Loop which is about 0.7 up the Mt Si trail. It adds about 1/3rd of a mile to the Mt Si hike. Nothing really different from the regular trail other than you cross a slope of talus rocks near the end. There is a view to the SE from the talus slope. When I got up to the basin I decided to do the Haystack. I ended up having it all to myself; I believe a first for me. Another young couple I had passed earlier on the trail came up after me but they stopped short of the actual summit. Views of Mt Rainier & other far-away peaks were clouded in but I could see Seattle & Bellevue skylines as well as local peaks and valleys. Only wildflowers I saw on entire hike were a few paintbrush in the haystack basin. I ended up hiking down w/ the couple as they hiked about my pace and the conversation was interesting. The guy had gone to WWU, go Viks! No bugs. Good to get in a hike in the sun before the weather changes. Is summer really over?
Talus Loop, Mount Si
— Jul 27, 2011
— Hikingmama
Day hike
Features:
Wildflowers blooming | Ripe berries
Issues:
Blowdowns
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Great hiking today. Started out overcast, but figured that was a plus to keeping cool. Minimal cars...
Great hiking today. Started out overcast, but figured that was a plus to keeping cool. Minimal cars in the lot as we started out, very few crowds. Made it to Snags Flat before losing oomph, but the trail was clear and manageable. The steepness and poor footwear was our downfall. We are outta shape and this was the first hike in over a month for us. Coming down we decided to take the Talus Loop Trail and really enjoyed that. Saw no one on that one the whole way down. Ran into two places on this loop that had logs across the trail, easily gotten over. Foliage on both trails was spectacular, loved the tall tall pines and berries almost ready for picking, someone else beat us to the ripe ones. Sun came out towards the end and made the return to the parking lot a good walk.
Day hike
Features:
Wildflowers blooming | Ripe berries
Issues:
Water on trail
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Perfect day to hike up to Mount Si, the weather was mild and it was partly cloudy. It wasn't too col...
Perfect day to hike up to Mount Si, the weather was mild and it was partly cloudy. It wasn't too cold or too warm, just perfect Northwest hiking temperature.
We started the trail at about 10 am and reached the top around noon. This is a very popular hike, so on a nice Sunday it is no wonder that the trail was a little crowded. Along the way we saw multiple groups cutting switchbacks and told them the reasons why this is a bad idea. And I would just like to reiterate them here as well: Cutting switchbacks leads to soil erosion and more time and effort that needs to be put in to trail maintenance. Not that trail maintenance is a bad thing, it's just very strenuous and time-consuming; so, why do it if you don't have to? Also, trails were made with switchbacks for a reason, to reduce soil erosion and to make the ascent easier. So do us all a favor, don't cut switchbacks. After lunch we headed up to check out the haystack, but decided to save that for another day because we were so tired. We started our descent around 1 and returned to the car around 3. On the way down we decided to go on the Talus Loop Trail for fun. There were wildflowers blooming, great views of the Cascades, and we only encountered one other group on our way. So if you're looking to hike up to the top of Mount Si, but still want some solitude, I suggest taking the Talus Loop Trail and bypass all the crowds and noise. Overall good hike and we might do it again when we're not so sore. There were no problems on the trail except for one muddy patch that's no big deal and some inconsiderate hikers. ALSO, Salmon berries were in bloom. YUM. |
![]() Talus Loop. Photo by Barbara Miller.
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