US Army Corps of Engineers
Seattle District Website



The Mud Mountain Dam Park will reopen to visitors on March 1, 2021. The open hours will be 9 a.m. to 4 p.m. The picnic shelters, playgrounds and restrooms will also be open.

The park falls under the Puget Sound region, which is currently in phase 2 under the state’s Healthy Washington plan. The park will restrict gatherings to a max of 15 people from outside your household, with a limit of 2 households. Compliance with this request will help keep others safe and keep the park open. Staff have installed hand sanitizer stations in the picnic shelters and the trail restrooms to increase visitor safety across the project. Visitors will be required to wear masks and practice social distancing while visiting the park. The Corps of Engineers is committed to doing its part to help keep our city and region healthy and combat the further spread of COVID-19.

Critical operations staff will continue working at the facility to support water management for the region.

Mud Mountain Dam is a U.S. Army Corps of Engineers flood risk reduction 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.  (206)-316-3019


Mud Mountain Dam recreation area


Park Hours for 2020 (Subject to Change):

March 1, 2021 - April 30, 2021:  9 a.m. - 4 p.m. (Closed Weekends)

May 1, 2021 - May 22, 2021:      9 a.m. - 4 p.m. (Open Weekends)

May 23, 2021 -  Sept 6, 2021:     9 a.m. - 8 p.m.  (Open Weekends)

Sep 7, 2021 - Dec 31, 2021:        9 a.m. - 4 p.m. (Closed Weekends) 


Mud Mountain Dam observes the following federal holidays:

Friday, January 01 (New Year's Day) 

Monday, January 18 (Martin Luther King Day)

Monday, February 15 (Presidents' Day)

Monday, October 11 (Columbus Day)

Thursday, November 11 (Veterans Day)

Thursday, November 25 (Thanksgiving)

Friday, December 24 (Christmas Eve)


Wading Pool Approximate Open Dates (Subject to Change):

The Wading Pool will remain closed until further notice.


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 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. 



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.