According to the latest available information, the boat ramp located at 3041 E Mason Lake Dr E, Grapeview, WA 98546 is a public boat launch operated by the Washington Department of Fish and Wildlife. It provides access to Mason Lake, which is a freshwater lake located in Mason County, Washington. The ramp is reported to be wide enough to accommodate two boats at a time.

As per the regulations posted by the Washington Department of Fish and Wildlife, motorized and non-motorized boats are allowed on the lake. However, they should comply with the state boating laws and regulations, including carrying appropriate safety equipment, having valid registration, and not exceeding the maximum horsepower limit. The fish species that can be caught in the lake include rainbow trout, largemouth bass, smallmouth bass, yellow perch, and black crappie, among others.

It is important to note that the accuracy of this information may vary over time, and it is advisable to check with the relevant authorities before planning a trip to the boat ramp.