Reservations at Mason Lake are EXCLUSIVELY for the enjoyment of Green Diamond, and other qualified members, NOT OPEN TO PUBLIC.
If you are a non-member local business looking to rent one of our facilities, please contact our office at 360-426-0737.

Only Credit Card Payments Will Be Accepted at the Park, Only 2 campsites per stay allowed. NEW alcohol policy, no kegs, or alcohol containers larger then 3 gallons allowed in Group camps or campground. Picnic shelters must apply for a Banquet permit in order to serve alcohol.

Secure on-line reservations provided by Leisure Interactive.
Once you complete your on-line reservation you will receive a reservation confirmation email.
Please contact the Mason Lake Recreation Area directly at (360)426-0737 if you have any questions or changes to your reservation.
Office Hours are 8:00 am to 5:00 pm Mon - Sun.

Click Here to View or Print the Mason Lake Recreation Area Rules and Regulations

Park closing for day-use and camping October 1st - April 30th. Loud Music is not allowed in picnic shelters or group camps

Reservations at Mason Lake are EXCLUSIVELY for the enjoyment of Green Diamond, and other qualified members, NOT OPEN TO PUBLIC. If you are a non-member local business looking to rent one of our facilities, please contact our office at 360-426-0737.

Reservations at Mason Lake are EXCLUSIVELY for the enjoyment of Green Diamond, and other qualified members, NOT OPEN TO PUBLIC.
If you are a non-member local business looking to rent one of our facilities, please contact our office at 360-426-0737.