Your session expired, please sign in again to continue.
Help keep our trails and parks open during COVID-19 by committing to social distancing. Some trails or park services may be closed this weekend so check with local authorities before heading out.
Learn more

Sourdough Mountain Trail is a 10.2 mile moderately trafficked out and back trail located near Marblemount, Washington that features a river and is rated as difficult. The trail is primarily used for hiking, nature trips, and bird watching and is best used from May until October.

Length 10.2 mi Elevation gain 5,104 ft Route type Out & Back

Hiking

Nature trips

Bird watching

Forest

River

Views

Wild flowers

Wildlife

Snow

No dogs

Waypoints (0)
Contact
Getting There

Washington State Tourism, P.O. Box 42500 , Olympia, WA, 98504-2500, Phone: 360-586-2088, tobyg@tourism.wa.gov

Directions from Ross Dam Parking Area: Travel west on Highway 20 to mile marker 126. Turn right and cross the Diablo Dam. Drive into the community of Diablo and park near the enclosed swimming pool. The trail begins behind the pool.

Weather
UV Index
Daylight
Reviews (177)
Photos (129)
Recordings (113)
Completed (329)
Andrii Karaivanskyi
Yellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarAugust 2, 2020
Hiking
View Andrii's Recording
Chris Tess
Yellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarGray StarGray StarAugust 2, 2020
HikingBugsNo shadeRockyScrambleSnow

Well someone posted it was steep two miles up at first. Well I’d have to say it was almost three and the last mile or so was not easy either. Snow at the top with great views. Saw a bear on the way down he was busy eating. It was a great day in all the bugs were annoying. But Bug spray took care of them. No shade on the last mile either. Take lots of water

Chris Tess
Yellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarGray StarGray StarAugust 1, 2020
HikingBugsNo shadeRockyScrambleSnow
View Chris's Recording
Danielle Osborne
Yellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarAugust 1, 2020
Hiking
View Danielle's Recording
Laura Radek
Yellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarJuly 27, 2020
HikingBugsOver grownRocky
View Laura's Recording
G K
Yellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarGray StarGray StarJuly 26, 2020
HikingBugsOver grown

This trial was a challenge and I don’t say that about many. The first two miles are super steep. We did this trial as we wanted to hike in Cascades National Park. Most everything in the valley is not in the park. The views are nice starting around mile 4. Until then, you’re in the woods. I think the reward was underwhelming for the amount of work. The view of Diablo is better before you get to the top and there were lovely wild flowers there. The view from the lookout is somewhat obstructed but you can see 360°.

View G's Recording
Liudmila Sudanava
Yellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarJuly 26, 2020
HikingBugs
View Liudmila's Recording
Marcus Miles
Yellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarJuly 26, 2020
Hiking

6-25-20 / Such an epic hike. Took me about 8 hours with a good long break at the top. The first two miles have gruesome elevation gain. After that it eases up a bit (but not much). Very strenuous hike that I only recommend to those who are already in good hiking shape. That said the views at the top are some of the best I’ve ever seen. Absolutely breathtaking. Side note: the hike down can be a bit rough due to the loose dirt/gravel. Hiking pole recommended but not mandatory.

Mritunjay K.
Yellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarGray StarGray StarJuly 21, 2020
HikingSnow

There are snow on top of mountain and it becomes risky if you are not well equipped.

Adam Stone
Yellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarJuly 21, 2020
Hiking
Teague OConnell
Yellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarJuly 20, 2020
HikingRockySnow

Epic hike on 7/19/20. You start climbing immediately and the uphill doesn’t end until you’re at the peak. We had an absolute blast playing in the snow at the top and the views were incredible. Like bucket list incredible. Coming down was rough on the knees, feet... whole body really. Hiking poles helped. Anyway, may do it again someday after I forget about how hard it was. Get out there and do it! It will be hard but you will be fine. Just start early and bring plenty of snacks to keep the energy up.

Allison Zimmermann
Yellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarJuly 18, 2020
HikingMuddySnow
View Allison's Recording
Nineveh O'Connell
Yellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarJuly 17, 2020
HikingSnow

Hiked on July 15, absolutely amazing. Started this hike around 9 am on a Wednesday, only a few other hikers on the trail. The climb for the first few miles was thankfully all in the shade at this time and we were rewarded with stunning views starting at around 3700' (2.2 miles into the climb). By the time you hit a bit of intermittent snow around 4800' the trail is less steep such that the snow is no problem to cross. One or two easy stream crossings as well. Perfect snow conditions at the top -- once you hit consistent snow it is all after the point where the trail snakes along the steep mountainside, so it feels very safe and is easy and fun to walk through the last couple of minutes to the lookout tower. Took 7 hours round trip including a long break at the top for views and lunch. The mountain top is very exposed, so be prepared with sunscreen and a hat if you want to hang around and take in the views.

Alec Harrison
Yellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarGray StarGray StarJuly 11, 2020
Hiking

no sourdough here

View Alec's Recording
Schuyler Boone
Yellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarJuly 11, 2020
Hiking

Completed on 7/10/20. Fantastic hike. The listed distance is wrong; it’s 10+ to the lookout at the summit. Absolutely incredible views. Still large patches of snow, particularly near the top, but it’s nothing that’s unmanageable, even in just hiking boots.

View Schuyler's Recording
Errin Humphrey
Yellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarJuly 10, 2020
HikingGreat!Snow
View Errin's Recording
Showing results 1 - 16 of 177