US Army Corps of Engineers
Seattle District


Mud Mountain Dam is a U.S. Army Corps of Engineers flood control dam and recreation facility on the White River near Mt. Rainier in Washington State. Visitors to the facility can view the dam, picnic, hike, bike or ride their horses in a scenic woodland setting.


From Seattle: Driving time 60 minutes
1. Take I-5 South to Hwy 18 East,
2. From Hwy 18 take the Auburn/Enumclaw exit
3. At Auburn take Hwy 164 East to Enumclaw
4. Go through Enumclaw and turn left onto Hwy 410 East
5. Go about 6 miles and turn right onto Mud Mountain Road
6. Go 2.5 miles to Mud Mountain Dam Project

From Tacoma: Driving time 60 minutes.
1. Take Hwy 167 to 410 East to Sumner
2. Hwy 410 East through Bonney Lake, Buckley and Enumclaw
3. In Enumclaw stay on Hwy 410 East
4. Go about 6 miles and turn right onto Mud Mountain Road
5. Go 2.5 miles to Mud Mountain Dam Project

Our office hours are from 7:30 am to 4:00 pm.  If you need additional information, please feel free to call us.  (360) 825-3211 or (206) 764-3717


Mud Mountain Dam recreation area


Park Hours for 2019 (Subject to Change):

Jan  02 - Apr 26      9 a.m. to 4 p.m. (Closed Weekends)

Apr 27 - May 10      9 a.m. to 4 p.m.  (Open Weekends)

May 11 - Sep 02      9 a.m. to 8 p.m.  (Open Weekends)

Sep 03 - Sep 29      9 a.m to 4 p.m.   (Open Weekends)

Sep 30 -  Dec 31     9 a.m to  4 p.m.  ( Closed Weekends)

The park staff will begin closing the park 30 minutes prior to the posted closing time.

Please keep this in mind when making arrangements to visit the recreation area.


Mud Mountain Dam observes the following federal holidays:

Monday, January 21 (Martin Luther King Day)

Monday, February 18 (Presidents' Day)

Monday, October 14 (Columbus Day)

Monday, November 11 (Veterans Day)

Thursday, November 28 (Thanksgiving)

Wednesday, December 25 (Christmas)


Wading Pool Approximate Open Dates (Subject to Change):

June 1st - September 1st: 1:30 pm - 7:30 pm. 

September 6th - September 15th (tentatively): 9:00 am - 4:00 pm. 


Picnic Shelters

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18 small shelters are available on a first come - first serve basis. Two large shelters are available to reserve free of charge. To make weekend reservations, the Chinook shelter requires a minimum of 75 people and the Cayuse shelter requires a minimum of 40 people. Reservations will be made for no later than 2 p.m. on weekends. Reservations may be made for dates between May 1st and September 30th. Rangers begin taking requests at the beginning of the year. Mud Mountain Dam Park Rangers may be reached Monday - Friday at (206) 316-3019. 

































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The 2-mile Rim Trail follows the White River and provides views of ancient volcanic mudflows and other sedimentary deposits that formed the reservoir rim.  This is an easy hike with terrain that is gentle to slightly sloping and offers spectacular views of the White River canyon and neighboring mountains.

Hikers and mountain bikers can also join horse riders on the River Trail.  This 3.1-mile trail begins at the equestrian parking lot about two miles north of the day use area.  You can wander down through mature and transitional stands of forest on a trail that gradually opens into mudflats along the banks of the White River. You can enjoy unobstructed scenic views, abundant wildlife, and access to the White River. 

The Vista Trail begins at the upper observation deck, which provides views of the White River basin to the north, and Mud Mountain Dam to the south. Descending 1/3rd of a mile down moderately steep switchbacks brings visitors to the lower observation deck, providing a closer view of the dam and it's operational areas.