Explore Brock - view hand-curated trail maps and driving directions as well as detailed reviews and photos from hikers, campers and nature lovers like you.

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We needed more time! Almost made it to the top. We will be back!

The summit isn’t the highlight as much as walking through the moss covered boulders and trees. Very popular, expect crowds.

November 18, 2018:
Trail: 80-90% covered in well packed snow; microspikes highly recommended, other hikers were turning around, a couple were going for it without anything but it just makes life so much easier. Only passed a handful on the trail and we had the summit to ourselves around noon.
Road: The few hundred feet just before the trailhead is covered in a thin layer of snow/ice but we made it easily in a Jeep Cherokee. It will make for a sketchy drive when it refreezes each night, due to not all of it being rutted down to gravel.

***Please, stay off the switch back shortcuts because they are causing trail erosion!

hiking
1 day ago

Great trail, plenty of switchbacks to help break up the incline but plan to go earlier in the day if you want the trail to yourself because it’s pretty popular and the trail can get pretty packed.

Is amazing!

Great as long as you go early

Insanely crowded. I felt like I was in a single file line going up.

hiking
5 days ago

Great quick, and relatively easy hike close to town. There were only a handful of us on the trail but I think that’s mostly because it’s Tuesday...it was pretty quiet once we started climbing which was nice. The last push to the top is tough but not impossible by any means. Views from the top were nice. Would definitely recommend if you don’t want to drive too far, or don’t have all day to hike.

7 days ago

The trail itself is great, but it's heavily trafficked

What a surprise—2 mountain goats chowing down on the rocky cliff not far from the climbing face. On a nice day, this is a good choice for a hike close to Seattle. Sweeping views from the top but be prepared to hear I-90 traffic and see ever expanding North Bend.

backpacking
8 days ago

I got engaged on Mount Si! Great day to go for a hike. Very clear and the trail was well maintained. There is a small spot where a tree has fallen over the trail and people have made a trail through it, but coming back down it’s hard to tell where it is. All over perfect day.

The trail is nice. It’s a good scenic trail with lots of cool places to stop and take pictures. The only bad thing is it’s a popular trail. Once you get to the top, you’ll be fighting for places to stop and take a break or pictures. We went on a Saturday morning and we were at the top with about 50 other people who had the same idea as we did today. The parking lot fills fast and people started parking on the street before the parking lot. So, we’ll definitely go back on a Wednesday morning or something so it won’t be so crowded.

11 days ago

trail running
14 days ago

Great hike for all age groups. If you’re not a beginner, I’d recommend trail running as well. Breathtaking views from the cliff. You can continue further if you wish as the trail continues further. Took us 3 hours from car to car including breaks. Would highly recommend for sunrise.

hiking
15 days ago

Always a fun little hike :)

Steep for kids, but amazing views and great lookout at the top. Mountain stream just over halfway up.

Great view from the top! A little steep at the end, but totally worth it.

19 days ago

The rain has arrived. Trail was not really muddy or slippery, though the top was shrouded in clouds with zero views. Good exercise as usual. Tip for getting some view under such weather: at the UPPER talus loop trail junction take a detour onto talus loop trail. In about five minutes you will arrive at the talus pile. This is low enough that it can be below the clouds, but high enough to have a descent view.

hiking
21 days ago

Hiked it with my dog on 10/27. I am super out of shape but I pushed myself and made it up and down! I am proud of myself- as this hike is an ass kicker. It was beautiful. My dog had no issues, he’s in much better shape than me haha!!

I've always found the hike a little boring up until the viewpoint. There are a lot of switchbacks and not a lot to see until the end. However, the view is definitely worth it! Be careful at the top!

We left the trailhead in the dark and still weren’t the first to arrive at the lookout. The guy there said we could share so it worked out great. Clear weather, didn’t even freeze at night. Watched sunset and sunrise and hiked to tarns and bell pass. Tons of day hikers came and went. The trail is boulders in a couple areas below, easy to cross the almost dry river. The twin Sisters range is amazing from up there. Trail got a bit steep when we were just about to the lookout. I’m 68, you can do it too. Mt Baker is my favorite anyway.

hiking
23 days ago

Amazing hike today!!! Went up Si a single lady came down engaged

Great hike today! Beautiful weather, no snow, lots of fallen leaves. Glad I brought my poles.

hiking
23 days ago

Went this morning (Saturday 10/27). Glad we got there early (~8:15) not too many people on the trail yet, but they were steadily streaming in as we left. We took ~2.5 hours with breaks at the view points. The lake isn’t really there at the moment, so the views weren’t as great, but still nice mountain shots. We thought the first big viewpoint was just as good or better than the one at the top (this may change when the lake is actually there).

hiking
24 days ago

Decent traffic, great views.

Hard ascent, but the views were amazing! There is a tree to cross the stream downriver of the trail.

Enjoyed

Beautiful hike with fall leaves. Trail is closed near the end so can’t get to the tunnel. Still worth the hike. We are new hikers and this was perfect. It’s down hill first then quite flat.

There’s a lot of switchbacks and is a little overcrowded. Otherwise, it’s a great trail!

hiking
28 days ago

Did this hike on the most beautiful sunny day!! We started at 1:30pm and got back to our car at 6:30. It took us about 2 hours to get to the ridge, which was mind blowing. The first mile and a half was a stroll, then the elevation gain started but was not too bad. I am an experienced hiker and would say that this was definitely one of the coolest hikes I’ve done!

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