Tacoma Power's Mayfield Lake Park is a water lover's destination in Lewis County, Washington. Mayfield Lake is formed by Mayfield Dam.

Reserve individual campsites now or call (888) CAMPOUT (226-7688). Learn about reservation policies and park rules.
  • Reserve 9 months in advance for dates between May 15 and September 15.
  • Sites are available on a first-come, first-served basis during April 15 - May 14 
    and Sept. 16 - Oct. 15.

Reserve Mayfield Lake Park's group camp now or call (888) CAMPOUT (226-7688). Reserve up to 9 months in advance for dates between Memorial Day weekend and October 15.

Online reservations for 2014: Kitchen shelter reservations for Mayfield Lake Park

About Mayfield Lake Park

  • Year-round day-use area and boat launch (open during daylight hours) 
  • Campsites open between April 15 and Oct. 15 
  • 55 individual campsites (water and electric hookups) 
  • 12-unit group camp open between Memorial Day weekend and Oct. 15 
  • Fire rings and picnic tables in all campsites 
  • Coin-operated showers 
  • Wheelchair-accessible restroom 
  • Reservable kitchen shelter

Year-round day-use area (open during daylight hours)
Day-use parking costs $5 on weekends and holidays between Memorial Day and Labor Day weekends. 

  • Boat launch
  • Fish year-round for trout, bass and coho salmon
  • Mayfield Lake is open to motorized watercraft
  • Swimming area
  • Playground
  • Horseshoe pits
  • Volleyball court

Download the Mayfield Lake Park Brochure

 Mayfield Lake Park Fees & Discounts - 2014

Camping Fees  
Water/electric hookups $31
Waterfront, water/electric hookups (sites 42-55) $35
Group camp, 3 water/electric hookups (entire area - 12 sites) $200
Extra vehicle (no charge for towed vehicles) $10
Extra vehicle season pass $75
Seniors or disabled discount for camping $5
Other Fees  
Individual or group campsite reservation fee

$6.50 online or $8.50 by phone

Day-use parking (weekends and holidays between Labor Day and Memorial Day weekends) $5
Season day-use parking pass $35
Kitchen shelter $50


Latitude: N 46 31 54.7   Longitude: W 122 33 25.3

From Tacoma, take I-5 south to Highway 12 East (Exit 68). Drive east on Highway 12 for about 17 miles. Turn left on Beach Road and drive a quarter of a mile to the park entrance.

An alternate route from Tacoma is to take Highway 7 south to Morton. At Morton, turn right onto Highway 12. Continue on Highway 12 to Beach Road, about 14 miles. Turn right and continue on Beach Road to the park entrance.

Mailing address
PO Box 655
Mossyrock, WA 98564

Physical address
180 Beach Rd.
Mossyrock, WA 98564

Park office: (360) 985-2364
Fishing and recreation line: (888) 502-8690