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Sheep Lake and Sourdough Gap

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This section of the 2600-mile Pacific Crest Trail (PCT) seems tailor-made for kids and dogs. It's gentle, scenic, and easily accessible, with a great swimming lake, resilient grassy meadows for romping, and easy off-trail scrambles. All this and more awaits hikers willing to share the trail with a lot of fellow nature lovers and the occasional bear--where there are huckleberries, there are sure to be bears, and there are some wonderful huckleberry brambles above this trail. Of course, with plenty of meadows for grazing, rocks to hide among, and trees to perch in, the area is also popular with a host of bird and animal species, including deer, mountain goats, hawks, falcons, marmots, martens, chipmunks, and the ever-faithful friend of hikers, gray jays.

The trail traverses the steep hillside meadows east of Chinook Pass, staying above SR 410 for the first mile. Traffic noise can be heard, and sometimes seen, but the views beyond make up for that. The deep valley of the Rainier Fork American River, with Naches Peak rising on the far side of the valley, is beautiful. Hikers with sharp eyes, or good binoculars, can often pick out hikers rounding the flank of Naches on the PCT, some 3 trail miles to the south.

After the first mile the trail veers north, climbing gently up to a bench below Sourdough Gap. Just past the 2.5 mile mark you'll drop into the Sheep Lake basin. The trail to the gap rounds the east side of the lake and begins a moderately steep climb up the valley wall to the rocky saddle of Sourdough Gap at 3.5 miles. Along the way the trail loops through a few switchbacks and offers wonderful views down to the lake and occasionally all the way back down to the trailhead.

Sourdough Gap is a small saddle in a jagged-edged ridge. You'll find a few spotty views of Mount Rainier during the approach to the gap, but for the really outstanding vistas you'll need to scramble up the steep talus slope on the northwest side of the gap. A faint boot-beaten path leads to the ridge crest--be careful, though, because the far side of the ridge falls away in a 500-foot cliff. From this ridge you'll be able to look southwest onto the Emmons Glacier of Mount Rainier. Directly below your vantage point is the Crystal Lakes basin--be sure to wave to the hikers clustered on the shores of those pretty lakes.

Those who'd rather stick to the established trail will have to forgo views of Rainier, but by continuing on the PCT about 0.25 mile north of Sourdough Gap, you'll find wonderful views east into the meadows of upper Morse Creek, with the blue pool of Placer Lake sitting dead center in the valley. Far beyond is the long spine of American Ridge in the William O. Douglas Wilderness.
Driving Directions:

From Enumclaw drive east on State Route 410 (Chinook Pass Highway) to Chinook Pass. Just east of Tipsoo Lake, turn left (north) into a small trailhead parking lot on the north side of the highway. The trailhead is found on the backside of the lot, behind the restrooms. If the parking lot is full, return to the Tipsoo Lake parking lot at the pass and hike the 0.25-mile trail around the lake to the lower lot and the PCT trailhead.

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Recent Trip Reports

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There are 27 trip reports for this hike. See all trip reports for this hike.
Sheep Lake and Sourdough Gap — Nov 01, 2011 — Cascadian Kim
Day hike
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What a great state we live in! In a little more than an hour's drive from Yakima, you can put your f...
What a great state we live in! In a little more than an hour's drive from Yakima, you can put your feet on a trail that hits on all cylinders... views from a mountain pass, a walk on the Pacific Crest Trail, the shores of an alpine lake, sights of four mountain peaks (Hood, Adams, St. Helens and Mt. Rainier), a climb up a ridge and then the added bonus of yet another lake in the backcountry. All these wonderful rewards in less than an 8 mile trek.

Today's adventure began with an amazing display of larches interspersed in the hills as we approached Chinook Pass in our vehicle. Our feet hit the trail from the parking lot on the eastside of the pass; the trail was cold and hard in the 27 degree temps - gloves and earmuffs were a necessity! In less than 2 miles, we reached Sheep Lake which had a skim of ice on its surface. That didn't keep us from enjoying the reflection in the calm waters. From the lake, we hiked the hill towards Sourdough Gap. Only one obstacle on that stretch of trail - a newly fallen tree - no worries for the determined. The views from the first gap were breathtaking. I was a little surprised by the distant hazey skies at this time of year; yet no clouds obstructed the sights of even Mt. Hood in the far-off distance. We spied one mountain goat high in the rocks above, basking in the sun. Our group ventured beyond the first gap in the ridge, to the second gap and down to a wonderful lunch spot overlooking Upper Crystal Lake and a view of snowy Mt. Rainier. I talked one hiker in our group into hustling down the alpine trail with me to the shores of Crystal Lake, adding another 1.5 miles to our day. The two of us quickly lunched on the lakeshore, then made the steep climb back to our party at the top. From there, all thirteen of us enjoyed an uneventful hike downhill, along the trail which had become slightly muddy in the sunshine. This beautiful November day would provide the mental fuel for the next few days in the classroom!
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Sheep Lake and Sourdough Gap — Oct 12, 2011 — Ed Becker
Day hike
Features: Fall foliage
Issues: Blowdowns | Snow on trail
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I arrived at Chinook Pass around 10:30 am and the temp was 37 F. 2 to 3 inches of snow at the parki...
I arrived at Chinook Pass around 10:30 am and the temp was 37 F.
2 to 3 inches of snow at the parking area and snow covered the trail with 1" to 2". Sunny and no wind. Sheep lake was pristine and quite wintery at 12:00 pm. with 3" to 4" of snow.

I hiked up to Sourdough Gap and the snow became a little deeper with elevation. A large treefall was down across the trial near the top and made for a tricky bi-pass. At the Gap at 2:00 pm with panoramic views. A little colder at the top with 5" to 6" snow but with the sun it was not a bad day.

As I headed back down the clouds began moving in and there were lots of slips and slides.

Down from Sheep Lake through the trees most of the snow was melted off the trail. I saw only two people the entire day. Lots of deer and elk tracks. Snow still covered the trail on the last 1.4 miles to the trail head, but only about 1". Out at 4:00 pm. I forgot that tramping in the snow takes more energy, but it was a good hike.
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Sheep Lake and Sourdough Gap, Threeway Peak — Sep 09, 2011 — Tomas
Day hike
Features: Wildflowers blooming
Issues: Bugs
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I had done the Crystal Mt loop 3 years ago & had summited Crystal Mt, Silver Queen, & Silver King @ ...
I had done the Crystal Mt loop 3 years ago & had summited Crystal Mt, Silver Queen, & Silver King @ that time. Had met Keith H at the time & exchanged info. I had wanted to also summit Threeway Peak but had not until today. Contacted Keith & he was nice to forward a lot of info about this hike/climb. I decided to do it from Chinook Pass instead of from Crystal but Keith's photos of the peak and routes were very helpful.

Hike from Chinook Pass toward Sheep Lake still has a lot of wildflowers. Asters most plentiful, also some thick Lupine meadows up by lake. Took about 1/2 hour to get to Sheep Lake, another 40 min to Sourdough Gap. Came upon 2 ladies near the gap & a man w/ them that was already at the Gap. We chatted a bit & I told them of my intention. They wanted to hike up toward where they could see the gondola @ Crystal but I told them they would have to go quite a ways. I recommended they go on the spur trail left off of the PCT & not too far up they would have great views of Crystal Lake(s) far below. I later found out they did this. I continued on the PCT past Threeway Peak which is off to the left going north on the PCT. I started up a gully toward the eastern ridge of Threeway. This was not too diffucult. I would recommend not going up to a saddle west of the Threeway summit. It looks like it might be doable from below but later up above I noticed there to be some steep cliffs. I continued west on the ridge but was stymied a bit by some steep rugged rocks. I finally decided to head down & around (what looked like it might be a path). This was ok but eventually I was forced to go up a gully & that was not fun. Very loose shale on the slopes of this peak - use caution! I eventually made it to the summit & a nice up close view of Mt Rainier. Further away peaks were not visible due to the haze from the recent wildfires. I took a few photos but did not stay long on the summit due to bugs, time constraint, and the narrow ledge that is the summit. I did not go back the way I came (the northern slope) but headed down another gully toward the PCT on the south side. Nothing like surfing on shale! I returned to my car tired but satisfied. I saw about 5 people going up & maybe 9 or 10 going down. Bugs not bad until I began climb up Threeway Peak. Warm day, almost used up all my H2O. Threeway Peak, for me anyway, was tougher than Silver Queen, Silver King, & Crystal Mt combined. There might be an easier way up, but I couldn't find it. Only 4 blowdowns on trail. Not much fall colors yet, but getting close.
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Sheep Lake and Sourdough Gap — Sep 01, 2011 — Bob and Barb
Day hike
Features: Wildflowers blooming
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Flowers lined the 3 mile trail from the TH to Sourdough Gap. We met several hikers returning from Sh...
Flowers lined the 3 mile trail from the TH to Sourdough Gap. We met several hikers returning from Sheep Lake to the TH as we were going up in the early afternoon. Very spry 90, 92, and 95 year old ladies were part of a hiking group from Olympia! :)! The flowers in the forest meadows before Sheep Lake were especially pretty and fragrant with lupine, sitka valerian, asters. bistort, and arnica! A few elephant head were present in the meadows by the lake. Mt Adams, the Goat Rocks and Mt St Helens could be seen from the gap. Flowers should remain good for at least another week! Bugs were not a problem!
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Sheep Lake and Sourdough Gap — Aug 21, 2011 — hike4life
Day hike
Features: Wildflowers blooming
Issues: Blowdowns | Snow on trail | Bugs
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Wow! What a gorgeous hike! Snow is pretty much all melted out minus about two spots--one about a mil...
Wow! What a gorgeous hike! Snow is pretty much all melted out minus about two spots--one about a mile in before you hit Sheep Lake and the other is up in Sourdough gap. Both are easily passable and no special gear needed. There were two blowdowns, but nothing difficult to get around. Wildflowers are in bloom and everwhere along the trail. We lucked out with gorgeous weather and had awesome views of Rainier and Adams. The trail is a fairly easy trail, which is great so you can enjoy the amazing scenery around you.

DO NOT FORGET the bug spray. We forgot and both got eaten alive since there was no escaping them anywhere. They were far worse up on the ridge than they were around the lakes, which we thought odd, so we didn't hang out for long.
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Hikingqueen.jpg
Photo by Hiking Queen.
Location
South Cascades -- Chinook Pass - Enumclaw or Hwy 410 area
Okanogan and Wenatchee National Forests, Naches Ranger District
Statistics
Roundtrip 7.0 miles
Elevation Gain 1100 ft
Highest Point 6400 ft
Features
Lakes
Wildflowers/Meadows
Mountain views
Wildlife
User info
Good for kids
Dogs allowed on leash
May encounter pack animals
Northwest Forest Pass required
Guidebooks & Maps
Snoqualmie Pass
Green Trails Mount Rainier East No. 270 and Bumping Lake No. 271

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Note: the description and driving directions for this Mountaineers Books entry are copyrighted and can't be changed.

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