In Hamilton, Washington, there are a few convenient options for dumping your black water and gray water tanks. Rasar State Park offers a dump station where you can conveniently dispose of your RV waste. They also provide fresh water and a hose for flushing tanks. Another option is Timberline RV & Mobile Park, which has a dump station available for guests. If you prefer a public facility, the Wastewater Treatment Plant in Hamilton also provides RV dump services. Creekside Camping is another nearby campground that offers a dump station for your convenience. Be sure to check if there are any fees associated with using their facilities.